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19-4323; Rev 16; 7/10
+5V-Powered, Multichannel RS-232 Drivers/Receivers
General Description
The MAX220-MAX249 family of line drivers/receivers is intended for all EIA/TIA-232E and V.28/V.24 communications interfaces, particularly applications where 12V is not available. These parts are especially useful in battery-powered systems, since their low-power shutdown mode reduces power dissipation to less than 5W. The MAX225, MAX233, MAX235, and MAX245/MAX246/MAX247 use no external components and are recommended for applications where printed circuit board space is critical.
Next-Generation Device Features
For Low-Voltage, Integrated ESD Applications MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246E: +3.0V to +5.5V, Low-Power, Up to 1Mbps, True RS-232 Transceivers Using Four 0.1F External Capacitors (MAX3246E Available in a UCSPTM Package) For Low-Cost Applications MAX221E: 15kV ESD-Protected, +5V, 1A, Single RS-232 Transceiver with AutoShutdownTM
MAX220-MAX249
Ordering Information
TEMP RANGE PIN-PACKAGE PART MAX220CPE+ 0C to +70C 16 Plastic DIP MAX220CSE+ 0C to +70C 16 Narrow SO MAX220CWE+ 0C to +70C 16 Wide SO MAX220C/D 0C to +70C Dice* MAX220EPE+ -40C to +85C 16 Plastic DIP MAX220ESE+ -40C to +85C 16 Narrow SO MAX220EWE+ -40C to +85C 16 Wide SO MAX220EJE -40C to +85C 16 CERDIP MAX220MJE -55C to +125C 16 CERDIP +Denotes a lead(Pb)-free/RoHS-compliant package. *Contact factory for dice specifications.
________________________Applications
Portable Computers Low-Power Modems Interface Translation Battery-Powered RS-232 Systems Multidrop RS-232 Networks
AutoShutdown and UCSP are trademarks of Maxim Integrated Products, Inc.
Ordering Information continued at end of data sheet.
Selection Table
Part Number MAX220 MAX222 MAX223 (MAX213) MAX225 MAX230 (MAX200) MAX231 (MAX201) MAX232 (MAX202) MAX232A MAX233 (MAX203) MAX233A MAX234 (MAX204) MAX235 (MAX205) MAX236 (MAX206) MAX237 (MAX207) MAX238 (MAX208) MAX239 (MAX209) MAX240 MAX241 (MAX211) MAX242 MAX243 MAX244 MAX245 MAX246 MAX247 MAX248 MAX249 Power Supply (V) +5 +5 +5 +5 +5 +5 and +7.5 to +13.2 +5 +5 +5 +5 +5 +5 +5 +5 +5 +5 and +7.5 to +13.2 +5 +5 +5 +5 +5 +5 +5 +5 +5 +5 No. of RS-232 Drivers/Rx 2/2 2/2 4/5 5/5 5/0 2/2 2/2 2/2 2/2 2/2 4/0 5/5 4/3 5/3 4/4 3/5 5/5 4/5 2/2 2/2 8/10 8/10 8/10 8/9 8/8 6/10 No. of Ext. Caps 4 4 4 0 4 2 4 4 0 0 4 0 4 4 4 2 4 4 4 4 4 0 0 0 4 4 Nominal Cap. Value (F) 0.047/0.33 0.1 1.0 (0.1) -- 1.0 (0.1) 1.0 (0.1) 1.0 (0.1) 0.1 -- -- 1.0 (0.1) -- 1.0 (0.1) 1.0 (0.1) 1.0 (0.1) 1.0 (0.1) 1.0 1.0 (0.1) 0.1 0.1 1.0 -- -- -- 1.0 1.0 SHDN & ThreeState No Yes Yes Yes Yes No No No No No No Yes Yes No No No Yes Yes Yes No No Yes Yes Yes Yes Yes Rx Active in SHDN -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Data Rate (kbps) 120 200 120 120 120 120 120 (64) 200 120 200 120 120 120 120 120 120 120 120 200 200 120 120 120 120 120 120 Features Ultra-low-power, industry-standard pinout Low-power shutdown MAX241 and receivers active in shutdown Available in SO 5 drivers with shutdown Standard +5/+12V or battery supplies; same functions as MAX232 Industry standard Higher slew rate, small caps No external caps No external caps, high slew rate Replaces 1488 No external caps Shutdown, three state Complements IBM PC serial port Replaces 1488 and 1489 Standard +5/+12V or battery supplies; single-package solution for IBM PC serial port DIP or flatpack package Complete IBM PC serial port Separate shutdown and enable Open-line detection simplifies cabling High slew rate High slew rate, int. caps, two shutdown modes High slew rate, int. caps, three shutdown modes High slew rate, int. caps, nine operating modes High slew rate, selective half-chip enables Available in quad flatpack package
________________________________________________________________ Maxim Integrated Products
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For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
ABSOLUTE MAXIMUM RATINGS--MAX220/222/232A/233A/242/243
(Voltages referenced to GND.) VCC ...........................................................................-0.3V to +6V V+ (Note 1) ..................................................(VCC - 0.3V) to +14V V- (Note 1) ..............................................................+0.3V to -14V Input Voltages TIN .............................................................-0.3V to (VCC - 0.3V) RIN (Except MAX220) ........................................................30V RIN (MAX220) ....................................................................25V TOUT (Except MAX220) (Note 2) ......................................15V TOUT (MAX220)..............................................................13.2V Output Voltages TOUT..................................................................................15V ROUT........................................................-0.3V to (VCC + 0.3V) Driver/Receiver Output Short Circuited to GND.........Continuous Continuous Power Dissipation (TA = +70C) 16-Pin Plastic DIP (derate 10.53mW/C above +70C)..842mW 18-Pin Plastic DIP (derate 11.11mW/C above +70C)..889mW 20-Pin Plastic DIP (derate 8.00mW/C above +70C) ..440mW 16-Pin Narrow SO (derate 8.70mW/C above +70C) ...696mW 16-Pin Wide SO (derate 9.52mW/C above +70C)......762mW 18-Pin Wide SO (derate 9.52mW/C above +70C)......762mW 20-Pin Wide SO (derate 10.00mW/C above +70C)....800mW 20-Pin SSOP (derate 8.00mW/C above +70C) ..........640mW 16-Pin CERDIP (derate 10.00mW/C above +70C).....800mW 18-Pin CERDIP (derate 10.53mW/C above +70C).....842mW Operating Temperature Ranges MAX2_ _AC_ _, MAX2_ _C_ _ .............................0C to +70C MAX2_ _AE_ _, MAX2_ _E_ _ ..........................-40C to +85C MAX2_ _AM_ _, MAX2_ _M_ _ .......................-55C to +125C Storage Temperature Range .............................-65C to +160C Lead Temperature (soldering, 10s) .................................+300C Soldering Temperature (reflow) 20 PDIP (P20M+1) .......................................................+225C All other lead(Pb)-free packages.................................+260C All other packages containing lead(Pb) ......................+240C
Note 1: For the MAX220, V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V. Note 2: Input voltage measured with TOUT in high-impedance state, VSHDN or VCC = 0V.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS--MAX220/222/232A/233A/242/243
(VCC = +5V 10%, C1-C4 = 0.1F MAX220, C1 = 0.047F, C2-C4 = 0.33F, TA = TMIN to TMAX unless otherwise noted.) (Note 3)
PARAMETER RS-232 TRANSMITTERS Output Voltage Swing Input Logic-Low Voltage Input Logic-High Voltage All devices except MAX220 MAX220: VCC = +5.0V All except MAX220, normal operation Logic Pullup/lnput Current VSHDN = 0V, MAX222/MAX242, shutdown, MAX220 VCC = +5.5V, VSHDN = 0V, VOUT = 15V, MAX222/MAX242 Output Leakage Current VCC = V SHDN = 0V Data Rate Transmitter Output Resistance Output Short-Circuit Current RS-232 RECEIVERS RS-232 Input Voltage Operating Range RS-232 Input Threshold Low RS-232 Input Threshold High VCC = +5V VCC = +5V 30 MAX220 All except MAX243 R2IN MAX243 R2IN (Note 4) All except MAX243 R2IN MAX243 R2IN (Note 4) 0.8 -3 1.8 -0.5 2.4 -0.1 1.3 25 V V V VCC = V+ = V- = 0V, VOUT = 2V VOUT = 0V VOUT = 0V MAX220 300 7 VOUT = 15V MAX220, V OUT = 12V 200 10M 22 60 mA 2 2.4 5 0.01 0.01 0.01 40 1 10 10 25 116 kbps A A All transmitter outputs loaded with 3k to GND 5 8 1.4 1.4 0.8 V V V CONDITIONS MIN TYP MAX UNITS
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+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
ELECTRICAL CHARACTERISTICS--MAX220/222/232A/233A/242/243 (continued)
(VCC = +5V 10%, C1-C4 = 0.1F MAX220, C1 = 0.047F, C2-C4 = 0.33F, TA = TMIN to TMAX unless otherwise noted.) (Note 3)
PARAMETER CONDITIONS All except MAX220/MAX243, VCC = +5V, no hysteresis in shutdown RS-232 Input Hysteresis MAX220 MAX243 RS-232 Input Resistance TTL/CMOS Output Voltage Low TTL/CMOS Output Voltage High TTL/CMOS Output Short-Circuit Current TTL/CMOS Output Leakage Current EN Input Threshold Low EN Input Threshold High Supply Voltage Range MAX220 No load VCC Supply Current (VSHDN = VCC), Figures 5, 6, 11, 19 3k load both inputs MAX222/MAX232A/MAX233A/ MAX242/MAX243 MAX220 MAX222/MAX232A/MAX233A/ MAX242/MAX243 TA = +25C Shutdown Supply Current MAX222/ MAX242 TA = 0C to +70C TA = -40C to +85C TA = -55C to +125C SHDN Input Leakage Current SHDN Threshold Low SHDN Threshold High MAX222/MAX242 MAX222/MAX242 MAX222/MAX242 CL = 50pF to 2500pF, MAX222/MAX232A/ RL = 3k to 7k , MAX233/MAX242/MAX243 VCC = +5V, TA = +25C, measured from +3V to -3V or MAX220 -3V to +3V t PHLT, Figure 1 Transmitter Propagation Delay TLL to RS-232 (Normal Operation) t PLHT, Figure 1 MAX222/MAX232A/ MAX233/MAX242/MAX243 MAX220 MAX222/MAX232A/ MAX233/MAX242/MAX243 MAX220 2.0 6 1.4 1.4 12 30 V/s 1.5 3 30.0 TA = +25C (MAX220) I OUT = 3.2mA I OUT = 1.6mA (MAX220) I OUT = -1.0mA Sourcing VOUT = V GND Sinking V OUT = VCC VSHDN = VCC or VEN = VCC (VSHDN = 0V for MAX222), 0V VOUT VCC MAX242 MAX242 2.0 4.5 0.5 4 12 15 0.1 2 2 35 10 50 50 100 1 0.8 A V V A 3.5 -2 10 VCC - 0.2 -10 30 0.05 1.4 1.4 5.5 2 10 mA 10 0.8 3 3 MIN 0.2 TYP 0.5 0.3 1 5 5 0.2 7 7 0.4 0.4 k V V mA A V V V MAX 1.0 V UNITS
Transition Slew Rate
1.3 4 1.5 5
3.5 10 3.5 10 s
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+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
ELECTRICAL CHARACTERISTICS--MAX220/222/232A/233A/242/243 (continued)
(VCC = +5V 10%, C1-C4 = 0.1F MAX220, C1 = 0.047F, C2-C4 = 0.33F, TA = TMIN to TMAX unless otherwise noted.) (Note 3)
PARAMETER t PHLR, Figure 2 Receiver Propagation Delay RS-232 to TLL (Normal Operation) t PLHR, Figure 2 Receiver Propagation Delay RS-232 to TLL (Shutdown) Receiver-Output Enable Time Receiver-Output Disable Time Transmitter-Output Enable Time (SHDN Goes High) Transmitter-Output Disable Time (SHDN Goes Low) Transmitter + to - Propagation Delay Difference (Normal Operation) Receiver + to - Propagation Delay Difference (Normal Operation) t PHLS, Figure 2 t PHLS, Figure 2 t ER tDR t ET CONDITIONS MAX222/MAX232A/MAX233/ MAX242/MAX243 MAX220 MAX222/MAX232A/MAX233/ MAX242/MAX243 MAX220 MAX242 MAX242 MAX242, Figure 3 MAX242, Figure 3 MAX222/MAX242, 0.1F caps (includes charge-pump start-up), Figure 4 MAX222/MAX242, 0.1F caps, Figure 4 MAX222/MAX232A/MAX233/ MAX242/MAX243 MAX220 t PHLR - tPLHR MAX222/MAX232A/MAX233/ MAX242/MAX243 MAX220 MIN TYP 0.5 0.6 0.6 0.8 0.5 2.5 125 160 250 MAX 1 3 1 3 10 10 500 500 s ns ns s s UNITS
tDT
600 300 2000 100 225
ns
t PHLT - tPLHT
ns
ns
Note 3: All units are production tested at hot. Specifications over temperature are guaranteed by design. Note 4: MAX243 R2OUT is guaranteed to be low when R2IN 0V or is unconnected.
__________________________________________Typical Operating Characteristics
MAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243
OUTPUT VOLTAGE vs. LOAD CURRENT
MAX220-01
AVAILABLE OUTPUT CURRENT vs. DATA RATE
MAX220-02
MAX222/MAX242 ON-TIME EXITING SHUTDOWN
1F CAPS V+ V+, V- VOLTAGE (V) +5V +5V 0V 0V 1F CAPS 0.1F CAPS V-10V V500s/div 0.1F CAPS SHDN V+
MAX220-03
10 8 6 OUTPUT VOLTAGE (V) 4 2 0 -2 -4 -6 -8 -10 0 5 EITHER V+ OR V- LOADED VCC = +5V NO LOAD ON TRANSMITTER OUTPUTS (EXCEPT MAX220, MAX233A) V- LOADED, NO LOAD ON V+ 0.1F
1F
11 10 OUTPUT CURRENT (mA) 9 8 7 6 5 ALL CAPS 0.1F ALL CAPS 1F VCC = +5.25V OUTPUT LOAD CURRENT FLOWS FROM V+ TO V-
+10V
0.1F
1F
VCC = +4.75V
V+ LOADED, NO LOAD ON V10 15 20 25 LOAD CURRENT (mA)
4 0 10 20 30 40 50 60 DATA RATE (kb/s)
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+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
ABSOLUTE MAXIMUM RATINGS--MAX223/MAX230-MAX241
(Voltages referenced to GND.) VCC ...........................................................................-0.3V to +6V V+ ................................................................(VCC - 0.3V) to +14V V- ............................................................................+0.3V to -14V Input Voltages TIN ............................................................-0.3V to (VCC + 0.3V) RIN .....................................................................................30V Output Voltages TOUT ..................................................(V+ + 0.3V) to (V- - 0.3V) ROUT........................................................-0.3V to (VCC + 0.3V) Short-Circuit Duration, TOUT to GND ........................Continuous Continuous Power Dissipation (TA = +70C) 14-Pin Plastic DIP (derate 10.00mW/C above +70C)....800mW 16-Pin Plastic DIP (derate 10.53mW/C above +70C)....842mW 20-Pin Plastic DIP (derate 11.11mW/C above +70C)....889mW 24-Pin Narrow Plastic DIP (derate 13.33mW/C above +70C) ..........1.07W 24-Pin Plastic DIP (derate 9.09mW/C above +70C)......500mW 16-Pin Wide SO (derate 9.52mW/C above +70C).........762mW 20-Pin Wide SO (derate 10.00mW/C above +70C).......800mW 24-Pin Wide SO (derate 11.76mW/C above +70C).......941mW 28-Pin Wide SO (derate 12.50mW/C above +70C) .............1W 44-Pin Plastic FP (derate 11.11mW/C above +70C) .....889mW 14-Pin CERDIP (derate 9.09mW/C above +70C) ..........727mW 16-Pin CERDIP (derate 10.00mW/C above +70C) ........800mW 20-Pin CERDIP (derate 11.11mW/C above +70C) ........889mW 24-Pin Narrow CERDIP (derate 12.50mW/C above +70C) ..............1W 24-Pin Sidebraze (derate 20.0mW/C above +70C)..........1.6W 28-Pin SSOP (derate 9.52mW/C above +70C).............762mW Operating Temperature Ranges MAX2 _ _ C _ _......................................................0C to +70C MAX2 _ _ E _ _ ...................................................-40C to +85C MAX2 _ _ M _ _......................................................-55C to +125C Storage Temperature Range .............................-65C to +160C Lead Temperature (soldering, 10s) .................................+300C Soldering Temperature (reflow) 20 PDIP (P20M+1) .........................................................+225C 24 PDIP (P24M-1) ..........................................................+225C All other lead(Pb)-free packages...................................+260C All other packages containing lead(Pb) ...........................+240C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS--MAX223/MAX230-MAX241
(MAX223/230/232/234/236/237/238/240/241, V CC = +5V 10%; MAX233/MAX235, V CC = +5V 5% C1-C4 = 1.0F; MAX231/MAX239, VCC = +5V 10%; V+ = +7.5V to +13.2V; TA = TMIN to TMAX; unless otherwise noted.) (Note 5) PARAMETER Output Voltage Swing VCC Supply Current CONDITIONS All transmitter outputs loaded with 3k to ground MAX232/233 No load, TA = +25C MAX223/230/234-238/240/241 MAX231/239 MAX231 MAX239 TA = +25C MAX223 MAX230/235/236/240/241 2.0 2.4 1.5 -30 200 +30 V A V MIN 5.0 TYP 7.3 5 7 0.4 1.8 5 15 1 10 15 1 5 15 50 10 0.8 mA A V mA MAX UNITS V
V+ Supply Current Shutdown Supply Current Input Logic-Low Voltage Input Logic-High Voltage Logic Pullup Current Receiver Input Voltage Operating Range
TIN, EN, SHDN (MAX233); EN, SHDN (MAX230/235-241) TIN EN, SHDN (MAX223); EN, SHDN (MAX230/235/236/240/241) VTIN = 0V
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+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
ELECTRICAL CHARACTERISTICS--MAX223/MAX230-MAX241 (continued)
(MAX223/230/232/234/236/237/238/240/241, V CC = +5V 10%; MAX233/MAX235, V CC = +5V 5% C1-C4 = 1.0F; MAX231/MAX239, VCC = +5V 10%; V+ = +7.5V to +13.2V; TA = TMIN to TMAX; unless otherwise noted.) (Note 5) PARAMETER CONDITIONS Normal operation VSHDN = +5V (MAX223) VSHDN = 0V (MAX235/236/240/241) Shutdown (MAX223) VSHDN = 0V, VEN = +5V (R4IN, R5IN) Normal operation VSHDN = 5V (MAX223) VSHDN = 0V (MAX235/236/240/241) Shutdown (MAX223) VSHDN = 0V, VEN = +5V (R4IN R5IN) 0.2 3 MIN 0.8 TYP 1.2 V 0.6 1.5 MAX UNITS
RS-232 Input Logic-Low Voltage
TA = +25C, VCC = +5V
1.7
2.4 V
RS-232 Input Logic-High Voltage
TA = +25C, VCC = +5V
1.5 0.5 5
2.4 1.0 7 0.4 V k V V 10 A ns
RS-232 Input Hysteresis RS-232 Input Resistance TTL/CMOS Output Voltage Low TTL/CMOS Output Voltage High TTL/CMOS Output Leakage Current Receiver Output Enable Time
VCC = +5V, no hysteresis in shutdown TA = +25C, VCC = +5V IOUT = 1.6mA (MAX231/232/233, IOUT = 3.2mA) IOUT = -1mA 0V ROUT VCC; VEN = 0V (MAX223); VEN = VCC (MAX235-241) Normal operation Normal operation MAX223 MAX235/236/239/240/241 MAX223 MAX235/236/239/240/241
3.5
VCC - 0.4 0.05 600 400 900 250 0.5 10 40 40 30
Receiver Output Disable Time
ns
Propagation Delay
Normal operation RS-232 IN to TTL/CMOS OUT, VSHDN = 0V CL = 150pF (MAX223)
tPHLS tPLHS 3
4 6 5.1
s
Transition Region Slew Rate
MAX223/MAX230/MAX234-241, TA = +25C, VCC = +5V, RL = 3k to 7k CL = 50pF to 2500pF, measured from +3V to -3V or -3V to +3V MAX231/MAX232/MAX233, TA = +25C, VCC = +5V, RL = 3k to 7k, CL = 50pF to 2500pF, measured from +3V to -3V or -3V to +3V VCC = V+ = V- = 0V, VOUT = 2V
V/s 4 300 10 30 mA mA
Transmitter Output Resistance Transmitter Output Short-Circuit Current
Note 5: All units are production tested at hot except for the MAX240, which is production tested at TA = +25C. Specifications over temperature are guaranteed by design.
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+5V-Powered, Multichannel RS-232 Drivers/Receivers
__________________________________________Typical Operating Characteristics
MAX223/MAX230-MAX241
TRANSMITTER OUTPUT VOLTAGE (VOH) vs. VCC
MAX220-04
MAX220-MAX249
TRANSMITTER OUTPUT VOLTAGE (VOH) vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES
MAX220-05
TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE
1 TRANSMITTER LOADED 11.0 10.0 SLEW RATE (V/s) 9.0 8.0 7.0 6.0 5.0 4.0 3 TRANSMITTERS LOADED 4 TRANSMITTERS LOADED 0 500 1000 1500 2000 2500 TA = +25C VCC = +5V LOADED, RL = 3k C1-C4 = 1F 2 TRANSMITTERS LOADED
MAX220-06 MAX220-09
8.5 2 TRANSMITTERS LOADED 8.0 VOH (V)
7.4 7.2 7.0 VOH (V)
12.0
1 TRANSMITTER LOADED 7.5
6.8 6.6 6.4 6.2 6.0 0
7.0
6.5 4.5
3 TRANSMITTERS LOADED TA = +25C C1-C4 = 1F TRANSMITTER 4 TRANSMITTERS LOADS = 3k || 2500pF LOADED 5.0 VCC (V) 5.5
160kb/s 80kb/s 20kb/s TA = +25C VCC = +5V 3 TRANSMITTERS LOADED RL = 3k C1-C4 = 1F 500 1000 1500 2000 2500
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (VOL) vs. VCC
MAX220-07
TRANSMITTER OUTPUT VOLTAGE (VOL) vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES
-6.2 -6.4 -6.6 VOL (V) -6.8 -7.0 -7.2 TA = +25C VCC = +5V 3 TRANSMITTERS LOADED RL = 3k C1-C4 = 1F 160kb/s 80kb/s 20kb/s
MAX220-08
TRANSMITTER OUTPUT VOLTAGE (V+, V-) vs. LOAD CURRENT
10 8 6 4 V+, V- (V) 2 0 -2 -4 -6 -8 -10 ALL TRANSMITTERS UNLOADED 0 5 10 15 20 25 30 35 40 45 50 CURRENT (mA) TA = +25C VCC = +5V C1-C4 = 1F V- LOADED, V+ AND VNO LOAD EQUALLY ON V+ LOADED
-6.0 -6.5 -7.0 VOL (V) -7.5 -8.0 -8.5 -9.0 4.5 5.0 VCC (V) 1 TRANSMITTER LOADED 2 TRANSMITTERS LOADED 3 TRANSMITTERS LOADED 4 TRANSMITTERS LOADED TA = +25C C1-C4 = 1F TRANSMITTER LOADS = 3k || 2500pF
-6.0
V+ LOADED, NO LOAD ON V-
-7.4 -7.6 5.5 0 500 1000 1500 2000 2500 LOAD CAPACITANCE (pF)
V+, V- WHEN EXITING SHUTDOWN (1F CAPACITORS)
MAX220-13
V+
O V-
VSHDN* 500ms/div *SHUTDOWN POLARITY IS REVERSED FOR NON MAX241 PARTS
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+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
ABSOLUTE MAXIMUM RATINGS--MAX225/MAX244-MAX249
(Voltages referenced to GND.) Supply Voltage (VCC) ...............................................-0.3V to +6V Input Voltages TIN ENA, ENB, ENR, ENT, ENRA, ENRB, ENTA, ENTB..................................-0.3V to (VCC + 0.3V) RIN .....................................................................................25V TOUT (Note 6)....................................................................15V ROUT........................................................-0.3V to (VCC + 0.3V) Short Circuit Duration (one output at a time) TOUT to GND ...........................................................Continuous ROUT to GND...........................................................Continuous Continuous Power Dissipation (TA = +70C) 28-Pin Wide SO (derate 12.50mW/C above +70C) .............1W 40-Pin Plastic DIP (derate 11.11mW/C above +70C) ...611mW 44-Pin PLCC (derate 13.33mW/C above +70C) ...........1.07W Operating Temperature Ranges MAX225C_ _, MAX24_C_ _ ..................................0C to +70C MAX225E_ _, MAX24_E_ _ ...............................-40C to +85C Storage Temperature Range .............................-65C to +160C Lead Temperature (soldering,10s)) .................................+300C Soldering Temperature (reflow) 40 PDIP (P40M-2) ..........................................................+225C All other lead(Pb)-free packages...................................+260C All other packages containing lead(Pb) ........................+240C
Note 6: Input voltage measured with transmitter output in a high-impedance state, shutdown, or VCC = 0V.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS--MAX225/MAX244-MAX249
(MAX225, VCC = +5.0V 5%; MAX244-MAX249, VCC = +5.0V 10%, external capacitors C1-C4 = 1F; TA = TMIN to TMAX; unless otherwise noted.) (Note 7) PARAMETER RS-232 TRANSMITTERS Input Logic-Low Voltage Input Logic-High Voltage Logic Pullup/lnput Current Data Rate Output Voltage Swing Tables 1a-1d Normal operation Shutdown 5 2 1.4 1.4 10 0.01 120 7.5 0.01 0.01 300 7 10M 30 25 VCC = +5V VCC = +5V VCC = +5V IOUT = 3.2mA IOUT = -1.0mA Sourcing VOUT = VGND Sinking VOUT = VCC Normal operation, outputs disabled, Tables 1a-1d, 0V VOUT VCC, VENR_ = VCC 3.5 -2 10 0.2 3 0.8 1.3 1.8 0.5 5 0.2 VCC - 0.2 -10 30 0.05 0.10 2.4 1.0 7 0.4 25 A 25 mA V V V V k V V mA A 50 1 64 0.8 V V A kbps V CONDITIONS MIN TYP MAX UNITS
Tables 1a-1d, normal operation All transmitter outputs loaded with 3k to GND VENA, VENB, VENT, VENTA, VENTB = VCC, VOUT = 15V VCC = 0V, VOUT = 15V
Output Leakage Current (Shutdown)
Tables 1a-1d
Transmitter Output Resistance Output Short-Circuit Current RS-232 RECEIVERS RS-232 Input Voltage Operating Range RS-232 Input Logic-Low Voltage RS-232 Input Logic-High Voltage RS-232 Input Hysteresis RS-232 Input Resistance TTL/CMOS Output Voltage Low TTL/CMOS Output Voltage High TTL/CMOS Output Short-Circuit Current TTL/CMOS Output Leakage Current
VCC = V+ = V- = 0V, VOUT = 2V (Note 8) VOUT = 0V
8
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+5V-Powered, Multichannel RS-232 Drivers/Receivers
ELECTRICAL CHARACTERISTICS--MAX225/MAX244-MAX249 (continued)
(MAX225, VCC = +5.0V 5%; MAX244-MAX249, VCC = +5.0V 10%, external capacitors C1-C4 = 1F; TA = TMIN to TMAX; unless otherwise noted.) (Note 7) PARAMETER POWER SUPPLY AND CONTROL LOGIC Supply Voltage Range No load VCC Supply Current (Normal Operation) 3k loads on all outputs TA = +25C TA = TMIN to TMAX Leakage current Control Input AC CHARACTERISTICS Transition Slew Rate Transmitter Propagation Delay TLL to RS-232 (Normal Operation) CL = 50pF to 2500pF, RL = 3k to 7k, VCC = +5V, TA = +25C, measured from +3V to -3V or -3V to +3V tPHLT, Figure 1 tPLHT, Figure 1 tPHLR, Figure 2 tPLHR, Figure 2 tPHLS, Figure 2 tPLHS, Figure 2 tPHLT - tPLHT tPHLR - tPLHR tER, Figure 3 tDR, Figure 3 MAX246-MAX249 (excludes charge-pump startup) Transmitter Enable Time tET MAX225/MAX245-MAX249 (includes charge-pump startup) 5 10 1.3 1.5 0.6 0.6 0.6 3.0 350 350 100 100 5 10 100 500 500 30 3.5 s 3.5 1.5 s 1.5 10 s 10 ns ns ns ns s ms ns V/s Logic-low voltage Logic-high voltage 2.4 1.4 1.4 MAX225 MAX244-MAX249 MAX225 MAX244-MAX249 MAX225 MAX244-MAX249 4.75 4.5 10 11 40 57 8 25 50 1 0.8 A A V 5.25 5.5 20 30 mA V CONDITIONS MIN TYP MAX UNITS
MAX220-MAX249
Shutdown Supply Current
Receiver Propagation Delay TLL to RS-232 (Normal Operation)
Receiver Propagation Delay TLL to RS-232 (Low-Power Mode) Transmitter + to - Propagation Delay Difference (Normal Operation) Receiver + to - Propagation Delay Difference (Normal Operation) Receiver-Output Enable Time Receiver-Output Disable Time
Transmitter Disable Time
tDT, Figure 4
Note 7: All units production tested at hot. Specifications over temperature are guaranteed by design. Note 8: The 300 minimum specification complies with EIA/TIA-232E, but the actual resistance when in shutdown mode or VCC = 0V is 10M as is implied by the leakage specification.
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9
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
__________________________________________Typical Operating Characteristics
MAX225/MAX244-MAX249
TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE
MAX220-10
OUTPUT VOLTAGE vs. LOAD CURRENT FOR V+ AND VMAX220-11
TRANSMITTER OUTPUT VOLTAGE (V+, V-) vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES
8.5 8.0 V+, V- (V) 7.5 7.0 6.5 VCC = +5V WITH ALL TRANSMITTERS DRIVEN LOADED WITH 5k 10kb/s 20kb/s 40kb/s 60kb/s
MAX220-12
18 TRANSMITTER SLEW RATE (V/s) 16 14 12 10 8 6 4 2 0 1 2 3 4 5 LOAD CAPACITANCE (nF) VCC = +5V
10 8 6 OUTPUT VOLTAGE (V) V+ AND V- LOADED VCC = +5V EXTERNAL CHARGE PUMP 1F CAPACITORS 8 TRANSMITTERS DRIVING 5k AND 2000pF AT 20kb/s V+ AND V- LOADED EITHER V+ OR V- LOADED
9.0
EXTERNAL POWER SUPPLY 1F CAPACITORS 40kb/s DATA RATE 8 TRANSMITTERS LOADED WITH 3k
4 2 0 -2 -4 -6 -8 -10 0
V- LOADED 6.0 5.5 V+ LOADED 5 10 15 20 25 30 35 5.0 0 1 200kb/s ALL CAPACITIORS 1F 2 3 4 5 100kb/s
LOAD CURRENT (mA)
LOAD CAPACITANCE (nF)
10
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+5V-Powered, Multichannel RS-232 Drivers/Receivers
Test Circuits/Timing Diagrams
+3V 0V* +3V INPUT 0V OUTPUT V+ OUTPUT 0V VtPHLR tPHLS VCC 50% 50% GND tPLHR tPLHS INPUT 50% 50%
MAX220-MAX249
tPLHT
tPHLT *EXCEPT FOR R2 ON THE MAX243 WHERE -3V IS USED.
Figure 1. Transmitter Propagation-Delay Timing
Figure 2. Receiver Propagation-Delay Timing
EN RX OUT RX IN a) TEST CIRCUIT 150pF EN INPUT +3V 0V V+ EN OUTPUT ENABLE TIME (tER) +3.5V RECEIVER OUTPUTS +0.8V a) TIMING DIAGRAM b) ENABLE TIMING +3V EN INPUT VOH RECEIVER OUTPUTS VOL c) DISABLE TIMING VOL + 0.5V 0V OUTPUT DISABLE TIME (tDR) VOH - 0.5V VCC - 2V b) TEST CIRCUIT EN 1 OR 0 TX 3k 50pF V+5V 0V -5V OUTPUT DISABLE TIME (tDT) RX 1k VCC - 2V SHDN +3V 0V
Figure 3. Receiver-Output Enable and Disable Timing
Figure 4. Transmitter-Output Disable Timing
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11
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
Control Pin Configuration Tables
Table 1a. MAX245 Control Pin Configurations
ENT 0 0 1 1 ENR 0 1 0 1 OPERATION STATUS Normal Operation Normal Operation Shutdown Shutdown TRANSMITTERS All Active All Active All High-Z All High-Z All Active All High-Z All Low-Power Receive Mode All High-Z RECEIVERS
Table 1b. MAX245 Control Pin Configurations
ENT 0 0 ENR 0 1 OPERATION STATUS Normal Operation Normal Operation TRANSMITTERS TA1-TA4 All Active All Active TB1-TB4 All Active All Active RECEIVERS RA1-RA5 All Active RA1-RA4 High-Z, RA5 Active All Low-Power Receive Mode RA1-RA4 High-Z, RA5 Low-Power Receive Mode RB1-RB5 All Active RB1-RB4 High-Z, RB5 Active All Low-Power Receive Mode RB1-RB4 High-Z, RB5 Low-Power Receive Mode
1
0
Shutdown
All High-Z
All High-Z
1
1
Shutdown
All High-Z
All High-Z
Table 1c. MAX246 Control Pin Configurations
ENA 0 0 ENB 0 1 OPERATION STATUS Normal Operation Normal Operation TRANSMITTERS TA1-TA4 All Active All Active TB1-TB4 All Active All High-Z RECEIVERS RA1-RA5 All Active All Active RA1-RA4 High-Z, RA5 Active RA1-RA4 High-Z, RA5 Low-Power Receive Mode RB1-RB5 All Active RB1-RB4 High-Z, RB5 Active All Active RB1-RB4 High-Z, RA5 Low-Power Receive Mode
1
0
Shutdown
All High-Z
All Active
1
1
Shutdown
All High-Z
All High-Z
12
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+5V-Powered, Multichannel RS-232 Drivers/Receivers
Table 1d. MAX247/MAX248/MAX249 Control Pin Configurations
TRANSMITTERS ENTA ENTB ENRA ENRB OPERATION STATUS Normal Operation Normal Operation Normal Operation Normal Operation Normal Operation Normal Operation Normal Operation Normal Operation Normal Operation Normal Operation Normal Operation Normal Operation MAX247 MAX248 MAX249 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 TA1-TA4 TA1-TA4 TA1-TA3 All Active All Active All Active All Active All Active All Active All Active All Active All High-Z All High-Z All High-Z All High-Z TB1-TB4 TB1-TB4 TB1-TB3 All Active All Active All Active All Active All High-Z All High-Z All High-Z All High-Z All Active All Active All Active All Active RECEIVERS RA1-RA4 RA1-RA4 RA1-RA5 All Active All Active All High-Z All High-Z All Active All Active All High-Z All High-Z All Active All Active All High-Z All High-Z RB1-RB5 RB1-RB4 RB1-RB5 All Active All High-Z, except RB5 stays active on MAX247 All Active All High-Z, except RB5 stays active on MAX247 All Active All High-Z, except RB5 stays active on MAX247 All Active All High-Z, except RB5 stays active on MAX247 All Active All High-Z, except RB5 stays active on MAX247 All Active All High-Z, except RB5 stays active on MAX247 Low-Power Receive Mode All High-Z, except RB5 stays active on MAX247 Low-Power Receive Mode All High-Z, except RB5 stays active on MAX247
MAX220-MAX249
1
1
0
0
Shutdown
All High-Z
All High-Z
Low-Power Receive Mode
1
1
0
1
Shutdown
All High-Z
All High-Z
Low-Power Receive Mode
1
1
1
0
Shutdown
All High-Z
All High-Z
All High-Z
1
1
1
1
Shutdown
All High-Z
All High-Z
All High-Z
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13
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
_______________Detailed Description
The MAX220-MAX249 contain four sections: dual charge-pump DC-DC voltage converters, RS-232 drivers, RS-232 receivers, and receiver and transmitter enable control inputs. mode, in three-state mode, or when device power is removed. Outputs can be driven to 15V. The powersupply current typically drops to 8A in shutdown mode. The MAX220 does not have pullup resistors to force the outputs of the unused drivers low. Connect unused inputs to GND or VCC. The MAX239 has a receiver three-state control line, and the MAX223, MAX225, MAX235, MAX236, MAX240, and MAX241 have both a receiver three-state control line and a low-power shutdown control. Table 2 shows the effects of the shutdown control and receiver threestate control on the receiver outputs. The receiver TTL/CMOS outputs are in a high-impedance, three-state mode whenever the three-state enable line is high (for the MAX225/MAX235/MAX236/MAX239- MAX241), and are also high-impedance whenever the shutdown control line is high. When in low-power shutdown mode, the driver outputs are turned off and their leakage current is less than 1A with the driver output pulled to ground. The driver output leakage remains less than 1A, even if the transmitter output is backdriven between 0V and (VCC + 6V). Below -0.5V, the transmitter is diode clamped to ground with 1k series impedance. The transmitter is also zener clamped to approximately V CC + 6V, with a series impedance of 1k. The driver output slew rate is limited to less than 30V/s as required by the EIA/TIA-232E and V.28 specifications. Typical slew rates are 24V/s unloaded and 10V/s loaded with 3 and 2500pF.
Dual Charge-Pump Voltage Converter
The MAX220-MAX249 have two internal charge-pumps that convert +5V to 10V (unloaded) for RS-232 driver operation. The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the V+ output. The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V- output. A small amount of power may be drawn from the +10V (V+) and -10V (V-) outputs to power external circuitry (see the Typical Operating Characteristics section), except on the MAX225 and MAX245-MAX247, where these pins are not available. V+ and V- are not regulated, so the output voltage drops with increasing load current. Do not load V+ and V- to a point that violates the minimum 5V EIA/TIA-232E driver output voltage when sourcing current from V+ and V- to external circuitry. When using the shutdown feature in the MAX222, MAX225, MAX230, MAX235, MAX236, MAX240, MAX241, and MAX245-MAX249, avoid using V+ and Vto power external circuitry. When these parts are shut down, V- falls to 0V, and V+ falls to +5V. For applications where a +10V external supply is applied to the V+ pin (instead of using the internal charge pump to generate +10V), the C1 capacitor must not be installed and the SHDN pin must be connected to V CC . This is because V+ is internally connected to VCC in shutdown mode.
RS-232 Receivers
EIA/TIA-232E and V.28 specifications define a voltage level greater than 3V as a logic 0, so all receivers invert. Input thresholds are set at 0.8V and 2.4V, so receivers respond to TTL level inputs as well as EIA/TIA-232E and V.28 levels. The receiver inputs withstand an input overvoltage up to 25V and provide input terminating resistors with
RS-232 Drivers
The typical driver output voltage swing is 8V when loaded with a nominal 5k RS-232 receiver and VCC = +5V. Output swing is guaranteed to meet the EIA/TIA232E and V.28 specification, which calls for 5V minimum driver output levels under worst-case conditions. These include a minimum 3k load, VCC = +4.5V, and maximum operating temperature. Unloaded driver output voltage ranges from (V+ -1.3V) to (V- +0.5V). Input thresholds are both TTL and CMOS compatible. The inputs of unused drivers can be left unconnected since 400k input pullup resistors to VCC are built in (except for the MAX220). The pullup resistors force the outputs of unused drivers low because all drivers invert. The internal input pullup resistors typically source 12A, except in shutdown mode where the pullups are disabled. Driver outputs turn off and enter a high-impedance state--where leakage current is typically microamperes (maximum 25A)--when in shutdown
14
Table 2. Three-State Control of Receivers
PART MAX223 SHDN SHDN __ Low High High __ EN X Low High __ EN(R) __ Low High Low High X RECEIVERS High Impedance Active High Impedance High Impedance Active High Impedance Active High Impedance
MAX225 MAX235 MAX236 MAX240
__ Low Low High
__
__
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+5V-Powered, Multichannel RS-232 Drivers/Receivers
nominal 5k values. The receivers implement Type 1 interpretation of the fault conditions of V.28 and EIA/TIA-232E. The receiver input hysteresis is typically 0.5V with a guaranteed minimum of 0.2V. This produces clear output transitions with slow-moving input signals, even with moderate amounts of noise and ringing. The receiver propagation delay is typically 600ns and is independent of input swing direction.
Shutdown--MAX222-MAX242
On the MAX222 MAX235 MAX236 MAX240 and MAX241 all receivers are disabled during shutdown. On the MAX223 and MAX242 two receivers continue to operate in a reduced power mode when the chip is in shutdown. Under these conditions the propagation delay increases to about 2.5s for a high-to-low input transition. When in shutdown, the receiver acts as a CMOS inverter with no hysteresis. The MAX223 and MAX242 also have a receiver output enable input (EN for the MAX242 and EN for the MAX223) that allows receiver output control independent of SHDN (SHDN for MAX241). With all other devices SHDN (SHDN for MAX241) also disables the receiver outputs. The MAX225 provides five transmitters and five receivers while the MAX245 provides ten receivers and eight transmitters. Both devices have separate receiver and transmitter-enable controls. The charge pumps turn off and the devices shut down when a logic high is applied to the ENT input. In this state, the supply current drops to less than 25A and the receivers continue to operate in a low-power receive mode. Driver outputs enter a high-impedance state (three-state mode). On the MAX225 all five receivers are controlled by the ENR input. On the MAX245 eight of the receiver outputs are controlled by the ENR input while the remaining two receivers (RA5 and RB5) are always active. RA1-RA4 and RB1-RB4 are put in a three-state mode when ENR is a logic high.
MAX220-MAX249
Low-Power Receive Mode
The low-power receive mode feature of the MAX223, MAX242, and MAX245-MAX249 puts the IC into shutdown mode but still allows it to receive information. This is important for applications where systems are periodically awakened to look for activity. Using low-power receive mode, the system can still receive a signal that will activate it on command and prepare it for communication at faster data rates. This operation conserves system power.
Negative Threshold--MAX243
The MAX243 is pin compatible with the MAX232A, differing only in that RS-232 cable fault protection is removed on one of the two receiver inputs. This means that control lines such as CTS and RTS can either be driven or left unconnected without interrupting communication. Different cables are not needed to interface with different pieces of equipment. The input threshold of the receiver without cable fault protection is -0.8V rather than +1.4V. Its output goes positive only if the input is connected to a control line that is actively driven negative. If not driven, it defaults to the 0 or "OK to send" state. Normally the MAX243's other receiver (+1.4V threshold) is used for the data line (TD or RD) while the negative threshold receiver is connected to the control line (DTR DTS CTS RTS, etc.). Other members of the RS-232 family implement the optional cable fault protection as specified by EIA/TIA232E specifications. This means a receiver output goes high whenever its input is driven negative left unconnected or shorted to ground. The high output tells the serial communications IC to stop sending data. To avoid this the control lines must either be driven or connected with jumpers to an appropriate positive voltage level.
Receiver and Transmitter Enable Control Inputs
The MAX225 and MAX245-MAX249 feature transmitter and receiver enable controls. The receivers have three modes of operation: full-speed receive (normal active) three-state (disabled) and lowpower receive (enabled receivers continue to function at lower data rates). The receiver enable inputs control the full-speed receive and three-state modes. The transmitters have two modes of operation: full-speed transmit (normal active) and three-state (disabled). The transmitter enable inputs also control the shutdown mode. The device enters shutdown mode when all transmitters are disabled. Enabled receivers function in the low-power receive mode when in shutdown.
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+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
Tables 1a-1d define the control states. The MAX244 has no control pins and is not included in these tables. The MAX246 has ten receivers and eight drivers with two control pins, each controlling one side of the device. A logic high at the A-side control input (ENA) causes the four A-side receivers and drivers to go into a three-state mode. Similarly, the B-side control input (ENB) causes the four B-side drivers and receivers to go into a three-state mode. As in the MAX245, one Aside and one B-side receiver (RA5 and RB5) remain active at all times. The entire device is put into shutdown mode when both the A and B sides are disabled (ENA = ENB = +5V). The MAX247 provides nine receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs each control four drivers. The ninth receiver (RB5) is always active. The device enters shutdown mode with a logic high on both ENTA and ENTB. The MAX248 provides eight receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs control four drivers each. This part does not have an always-active receiver. The device enters shutdown mode and transmitters go into a three-state mode with a logic high on both ENTA and ENTB. The MAX249 provides ten receivers and six drivers with four control pins. The ENRA and ENRB receiver enable inputs each control five receiver outputs. The ENTA and ENTB transmitter enable inputs control three drivers each. There is no always-active receiver. The device enters shutdown mode and transmitters go into a three-state mode with a logic high on both ENTA and ENTB. In shutdown mode, active receivers operate in a low-power receive mode at data rates up to 20kb/s.
__________Applications Information
Figures 5 through 25 show pin configurations and typical operating circuits. In applications that are sensitive to power-supply noise, VCC should be decoupled to ground with a capacitor of the same value as C1 and C2 connected as close as possible to the device.
16
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+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
+5V INPUT C3
TOP VIEW
C5 C1+ 1 V+ 2 C1- 3 C2+ 4 C2- 5 V- 6 T2OUT 7 R2IN 8
+
16 VCC 15 GND 14 T1OUT
C1 C2
16 VCC C1+ +5V TO +10V 3 C1VOLTAGE DOUBLER 4 C2+ +10V TO -10V 5 C2- VOLTAGE INVERTER 1 +5V 400k 11 T1IN
V+ 2 +10V 6 -10V C4
V-
MAX220 MAX232 MAX232A
13 R1IN 12 R1OUT 11 T1IN 10 T2IN 9 R2OUT TTL/CMOS INPUTS
T1OUT 14 RS-232 OUTPUTS T2OUT 7
+5V 400k 10 T2IN 12 R1OUT
DIP/SO
CAPACITANCE (F) DEVICE C1 C2 C3 C4 C5 MAX220 0.047 0.33 0.33 0.33 0.33 MAX232 1.0 1.0 1.0 1.0 1.0 MAX232A 0.1 0.1 0.1 0.1 0.1 TTL/CMOS OUTPUTS
R1IN 13 5k RS-232 INPUTS
9 R2OUT
R2IN 8 5k GND 15
Figure 5. MAX220/MAX232/MAX232A Pin Configuration and Typical Operating Circuit
+5V INPUT C3 ALL CAPACITORS = 0.1F C5 17 VCC 3 +10V C1+ +5V TO +10V V+ 4 C1- VOLTAGE DOUBLER 5 C2+ 7 -10V +10V TO -10V V6 C2C4 VOLTAGE INVERTER 2 +5V 400k 12 T1IN TTL/CMOS INPUTS +5V 400k 11 T2IN (EXCEPT MAX220) T2OUT 8 (EXCEPT MAX220) T1OUT 15 RS-232 OUTPUTS
TOP VIEW
(N.C.) EN 1 C1+ 2 V+ 3 C1- 4 C2+ 5 C2- 6 V- 7 T2OUT 8 R2IN 9
+
(N.C.) EN 1 18 SHDN 17 VCC 16 GND 15 T1OUT C1+ 2 V+ 3 C1- 4 C2+ 5 C2- 6 V- 7 T2OUT 8
+
20 SHDN 19 VCC 18 GND 17 T1OUT
C1
C2
MAX222 MAX242
MAX222 MAX242
16 N.C. 15 R1IN 14 R1OUT 13 N.C. 12 T1IN 11 T2IN TTL/CMOS OUTPUTS
14 R1IN 13 R1OUT 12 T1IN 11 T2IN 10 R2OUT
R2IN 9 R2OUT 10
13 R1OUT
R1IN 14 5k RS-232 INPUTS
DIP/SO
SSOP
10 R2OUT 1 (N.C.) EN
R2IN 9 5k GND 16 SHDN 18
( ) ARE FOR MAX222 ONLY. PIN NUMBERS IN TYPICAL OPERATING CIRCUIT ARE FOR DIP/SO PACKAGES ONLY.
Figure 6. MAX222/MAX242 Pin Configurations and Typical Operating Circuit
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+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
+5V
TOP VIEW
0.1F 28 +5V T1IN +5V 400k 4 T2IN +5V 400k 25 T3IN +5V 400k 24 T4IN +5V 400k 23 26 5 T5IN ENT T5OUT R1OUT R1IN 5k 6 R2OUT R2IN 5k 7 R3OUT R3IN 5k 22 R4OUT R4IN 5k 21 R5OUT R5IN 5k 1 2 ENR ENR 20 19 8 9 T5OUT 16 15 10 T4OUT 17 T3OUT 18 T2OUT 12 T1OUT VCC 400k 27 VCC
+
ENR 1 ENR 2 T1IN 3 T2IN 4 R1OUT 5 R2OUT 6 R3OUT 7 R3IN 8 R2IN 9 R1IN 10 T1OUT 11 T2OUT 12 GND 13 GND 14 28 VCC 27 VCC 26 ENT 25 T3IN
3
11
MAX225
24 T4IN 23 T5IN 22 R4OUT 21 R5OUT 20 R5IN 19 R4IN 18 T3OUT 17 T4OUT 16 T5OUT 15 T5OUT
SO
MAX225 FUNCTIONAL DESCRIPTION 5 RECEIVERS 5 TRANSMITTERS 2 CONTROL PINS 1 RECEIVER ENABLE (ENR) 1 TRANSMITTER ENABLE (ENT)
PINS (ENR, GND, VCC, T5OUT) ARE INTERNALLY CONNECTED. CONNECT EITHER OR BOTH EXTERNALLY. T5OUT IS A SINGLE DRIVER.
GND 13
GND 14
Figure 7. MAX225 Pin Configuration and Typical Operating Circuit
18
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+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
TOP VIEW
+5V INPUT 1.0F 11 VCC +5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER +5V 400k 7 T1IN T1OUT 2
12 1.0F
C1+
1.0F V+ 13
14 C115 C2+ 16 C2-
1.0F
V-
17 1.0F
+
T3OUT 1 T1OUT 2 T2OUT 3 R2IN 4 R2OUT 5 T2IN 6 T1IN 7 R1OUT 8 R1IN 9 GND 10 VCC 11 C1+ 12 V+ 13 C1- 14 28 T4OUT 27 R3IN 26 R3OUT 25 SHDN (SHDN) 24 EN (EN) TTL/CMOS INPUTS 20 T3IN +5V 400k 21 T4IN 6 T2IN +5V 400k +5V 400k
T1
T2
T2OUT 3 RS-232 OUTPUTS
MAX223 MAX241
23 R4IN* 22 R4OUT* 21 T4IN 20 T3IN 19 R5OUT* 18 R5IN* 17 V16 C215 C2+
T3
T3OUT 1
T4
T4OUT 28
8 R1OUT
R1
R1IN 9 5k
5 R2OUT
R2
R2IN 4 5k
Wide SO/ SSOP
LOGIC OUTPUTS
26 R3OUT
R3
R3IN 27 5k
RS-232 INPUTS
22 R4OUT
R4
R4IN 23 5k
19 R5OUT *R4 AND R5 IN MAX223 REMAIN ACTIVE IN SHUTDOWN. NOTE: PIN LABELS IN ( ) ARE FOR MAX241. 24 EN (EN)
R5
R5IN 18 5k SHDN 25 (SHDN)
GND 10
Figure 8. MAX223/MAX241 Pin Configuration and Typical Operating Circuit
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19
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
+5V INPUT
TOP VIEW
8 C1+ 10 C1-
1.0F 7 VCC V+ +5V TO +10V VOLTAGE DOUBLER V1.0F 9
1.0F T3OUT
+
1
20 T4OUT 19 T5IN 18 N.C. 17 SHDN 1.0F
T1OUT 2 T2OUT 3 T2IN 4 T1IN 5 GND 6 VCC 7 C1+ 8 V+ 9 C1- 10
11 +10V TO -10V C2+ 12 C2- VOLTAGE INVERTER +5V 400k 5 T1IN +5V 4 T2IN +5V 400k T1 400k T2
13 1.0F
T1OUT 2
MAX230
16 T5OUT 15 T4IN 14 T3IN 13 V12 C211 C2+ TTL/CMOS INPUTS
T2OUT 3
14 T3IN +5V
T3 400k
T3OUT 1
RS-232 OUTPUTS
15 T4IN +5V 19 T5IN N.C. x 18
T4 400k T5 GND 6
T4OUT 20
DIP/SO
T5OUT 16 17 SHDN
Figure 9. MAX230 Pin Configuration and Typical Operating Circuit
+5V INPUT
TOP VIEW
1 1.0F C+ 1 CV2 3 2
1.0F 13 (15) C1+ C1+5V (10) 8 TTL/CMOS INPUTS 7 (11) TTL/CMOS OUTPUTS 6 R2OUT R2 9 T1IN +5V 400k T2IN R1OUT T2 R1 400k T1 VCC +12V TO -12V VOLTAGE CONVERTER
+7.5V TO +12V
V+ V-
14 3
(16) C2 1.0F (13)
+
14 V+ 13 VCC 12 GND
C+ 1 C- 2 V- 3 T2OUT 4 R2IN 5 R2OUT 6 T2IN 7 N.C. 8
+
16 V+ 15 VCC 14 GND
T1OUT 11
T2OUT 4 R2IN 5 R2OUT 6 T2IN 7
MAX231
11 T1OUT 10 R1IN 9 8 R1OUT T1IN
MAX231
13 T1OUT 12 R1IN 11 R1OUT 10 T1IN 9 N.C.
RS-232 OUTPUTS T2OUT 4 R1IN 10 5k R2IN 5 5k (12)
DIP SO
RS-232 INPUTS
GND PIN NUMBERS IN ( ) ARE FOR SO PACKAGE. 12 (14)
Figure 10. MAX231 Pin Configurations and Typical Operating Circuit
20 ______________________________________________________________________________________
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
+5V INPUT 1.0F
TOP VIEW
+5V 400k T2IN 1 VCC
7
+
20 R2OUT 19 R2IN 18 T2OUT 17 VTTL/CMOS INPUTS
2
T1IN +5V 400k
T1OUT 5 RS-232 OUTPUTS T2OUT 18 R1IN 4 5k
T1IN 2 R1OUT 3 R1IN 4 T1OUT 5 GND 6 VCC 7 (V+) C1+ 8 GND 9 (V-) CS- 10
1 3 TTL/CMOS OUTPUTS
T2IN R1OUT
MAX233 MAX233A
16 C215 C2+ 14 V+ (C1-) 13 C1- (C1+) 12 V- (C2+) 11 C2+ (C2-) RS-232 INPUTS R2IN 19 5k C2+ 11 (12) C2+ C2CSGND 6 GND 9 10 (11) 15 16
20 R2OUT 8 (13) DO NOT MAKE CONNECTIONS TO 13 (14) THESE PINS 12 (10) INTERNAL -10V 17 POWER SUPPLY INTERNAL +10V POWER SUPPLY C1+ C1V-
DIP/SO
V14 (8) V+
PIN NAMES IN ( ) ARE FOR SO PACKAGE.
Figure 11. MAX233/MAX233A Pin Configuration and Typical Operating Circuit
+5V INPUT
TOP VIEW
7 1.0F 9 10 T1OUT 1 T2OUT 2 T2IN 3 T1IN 4 GND 5 VCC 6 C1+ 7 V+ 8 C1+ C1C2+
1.0F 6 VCC +5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER +5V 400k 4 T1IN +5V 400k 3 T2IN TTL/CMOS INPUTS 13 T3IN +5V 400k
T3 T2 T1
1.0F 8 V+ 12 1.0F
+
1.0F 16 T3OUT 15 T4OUT 14 T4IN
11 C2-
V-
T1OUT
1
MAX234
13 T3IN 12 V11 C210 C2+ 9 C1-
T2OUT
2 RS-232 OUTPUTS
T3OUT
16
DIP/SO
14 T4IN
+5V 400k
T4
T4OUT
15
GND 5
Figure 12. MAX234 Pin Configuration and Typical Operating Circuit
______________________________________________________________________________________ 21
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
+5V INPUT
TOP VIEW
1.0F 12 +5V 8 T1IN +5V 400k 7 T2IN +5V 400k TTL/CMOS INPUTS 24 R3IN 23 R3OUT 22 T5IN 21 SHDN +5V 22 T5IN 400k T5 T5OUT 19 16 T4IN 15 T3IN +5V 400k T4 T4OUT 1 T3 T3OUT 2 RS-232 OUTPUTS T2 T2OUT 4 VCC 400k T1 T1OUT 3
T4OUT 1 T3OUT 2 T1OUT 3 T2OUT 4 R2IN 5 R2OUT 6 T2IN 7 T1IN 8 R1OUT 9 R1IN 10 GND 11 VCC 12
+
MAX235
20 EN 19 T5OUT 18 R4IN 17 R4OUT 16 T4IN 15 T3IN 14 R5OUT 13 R5IN
9 R1OUT
T1
R1IN 10 5k
6 R2OUT
R2
R2IN 5 5k
DIP
TTL/CMOS OUTPUTS
23 R3OUT
R3
R3IN 24 5k
RS-232 INPUTS
17 R4OUT
R4
R4IN 18 5k
14 R5OUT
R5
R5IN 13 5k SHDN 21
20 EN GND 11
Figure 13. MAX235 Pin Configuration and Typical Operating Circuit
22
______________________________________________________________________________________
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
TOP VIEW
1.0F 9 10 1.0F 12 13 1.0F C1+ C1C2+ +10V TO -10V VOLTAGE INVERTER +5V 400k 7 T1IN T3OUT 1 T1OUT 2 T2OUT 3 R1IN 4 R1OUT 5 T2IN 6 T1IN 7 GND 8 VCC 9 C1+ 10 V+ 11 C1- 12 T1 +5V 400k 6 T2IN TTL/CMOS INPUTS 18 T3IN +5V 400k 19 T4IN 16 R3IN 15 V14 C213 C2+ 5k 5 R1OUT R1 R1IN 4 T4 T4OUT 24 +5V 400k T3 T3OUT 1 T2 T2OUT 3 RS-232 OUTPUTS T1OUT 2 VCC +5V TO +10V VOLTAGE DOUBLER V+ 11 1.0F +5V INPUT
V-
15 1.0F
14 C2-
+
24 T4OUT 23 R2IN 22 R2OUT 21 SHDN
MAX236
20 EN 19 T4IN 18 T3IN 17 R3OUT
DIP/SO
TTL/CMOS OUTPUTS 22 R2OUT R2 R2IN 23 5k 17 R3OUT R3IN 16 5k 20 EN GND 8 SHDN 21 RS-232 INPUTS
R3
Figure 14. MAX236 Pin Configuration and Typical Operating Circuit
______________________________________________________________________________________
23
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
TOP VIEW
+5V INPUT 1.0F 9 VCC +5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER +5V 1.0F V+ 11
10 1.0F 12 13 1.0F 14
C1+ C1C2+ C2-
V-
15 1.0F
T3OUT 1 T1OUT 2 T2OUT 3 R1IN 4 R1OUT 5 T2IN 6 T1IN 7 GND 8 VCC 9 C1+ 10 V+ 11 C1- 12
+
400k 24 T4OUT 23 R2IN 22 R2OUT 21 T5IN 6 T2IN +5V 7 T1IN +5V 400k T2 400k TTL/CMOS INPUTS 18 T3IN +5V T3 400k 19 T4IN +5V 15 V14 C213 C2+ 21 T5IN T4 400k T5 T5OUT 20 T4OUT 24 T3OUT 1 RS-232 OUTPUTS T2OUT 3 T1 T1OUT 2
MAX237
20 T5OUT 19 T4IN 18 T3IN 17 R3OUT 16 R3IN
DIP/SO
5 R1OUT
R1
R1IN 5k
4
TTL/CMOS OUTPUTS
22 R2OUT
R2
R2IN 5k
23
RS-232 INPUTS
17 R3OUT
R3
R3IN 5k
16
GND 8
Figure 15. MAX237 Pin Configuration and Typical Operating Circuit
24
______________________________________________________________________________________
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
TOP VIEW
+5V INPUT 1.0F 9 10 1.0F 12 13 1.0F 14 C1+ C1C2+ C2+5V 400k T2OUT 1 T1OUT 2 R2IN 3 R2OUT 4 T1IN 5 R1OUT 6 R1IN 7 GND 8 VCC 9 C1+ 10 V+ 11 C1- 12 +10V TO -10V VOLTAGE INVERTER VVCC +5V TO +10V VOLTAGE DOUBLER V+ 11 1.0F
15 1.0F
+
24 T3OUT 23 R3IN 22 R3OUT 21 T4IN
5 T1IN +5V
T1 400k
T1OUT
2
18 T2IN TTL/CMOS INPUTS 19 T3IN +5V +5V
T2 400k T3 400k
T2OUT
1 RS-232 OUTPUTS
MAX238
20 T4OUT 19 T3IN 18 T2IN 17 R4OUT 16 R4IN 15 V14 C213 C2+
T3OUT
24
21 T4IN
T4
T4OUT
20
6 R1OUT
R1
R1IN 5k
7
DIP/SO
4 R2OUT TTL/CMOS OUTPUTS 22 R3OUT R3 R2
R2IN 5k R3IN 5k
3 RS-232 INPUTS 23
17 R4OUT
R4
R4IN 5k
16
GND 8
Figure 16. MAX238 Pin Configuration and Typical Operating Circuit
______________________________________________________________________________________
25
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
TOP VIEW
+5V INPUT 1.0F 4 6 1.0F 7 C1+ C1+5V 400k 24 T1IN R1OUT 1 R1IN 2 GND 3 VCC 4 V+ 5 C+ 6 C- 7 V- 8 R5IN 9 R5OUT 10 R4OUT 11 R4IN 12 VCC +10V TO -10V VOLTAGE INVERTER 5 V+ V8 1.0F +7.5V TO +13.2V INPUT
+
T1 +5V 400k
T1OUT
19
24 T1IN 23 T2IN 22 R2OUT 21 R2IN TTL/CMOS INPUTS 23 T2IN
T2 +5V 400k
T2OUT
20
RS-232 OUTPUTS
MAX239
20 T2OUT 16 T3IN 19 T1OUT 18 R3IN 17 R3OUT 16 T3IN 5k 15 N.C. 14 EN 13 T3OUT 5k 22 R2OUT R2 R2IN 21 1 R1OUT R1 R1IN 2 T3 T3OUT 13
DIP/SO
TTL/CMOS OUTPUTS
17 R3OUT
R3
R3IN 18 5k
RS-232 INPUTS
11 R4OUT
R4
R4IN 12 5k
10 R5OUT
R5
R5IN 9 5k 15 N.C.
14 EN GND 3
Figure 17. MAX239 Pin Configuration and Typical Operating Circuit
26
______________________________________________________________________________________
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
+5V INPUT
TOP VIEW
25 1.0F
1.0F 19 VCC +5V TO +10V VOLTAGE DOUBLER +5V TO -10V VOLTAGE INVERTER +5V 400k 15 T1IN +5V 14 T2IN N.C. R2IN N.C. T2OUT T1OUT T3OUT T4OUT R3IN R3OUT T5IN N.C. +5V TTL/CMOS INPUTS 37 T3IN +5V 400k T4 400k T5 R1 T5OUT R1IN 5k 13 R2OUT R2IN 10 5k TTL/CMOS OUTPUTS 3 R3OUT R3IN 4 5k 39 R4OUT R4IN 40 5k 36 R5OUT R5 R5IN 35 5k 42 EN GND 18 SHDN 43 RS-232 INPUTS 41 17 T4OUT 5 400k T3 T3OUT 6 RS-232 OUTPUTS 400k T2 T2OUT 8 T1 T1OUT 7
1.0F V+ 26
C1+
27 C128 C2+ 29 C2-
1.0F
V-
30 1.0F
11 10 9 8 7 6 5 4 3 2 1 N.C. R2OUT T2IN T1IN R1OUT R1IN GND VCC N.C. N.C. N.C.
12 13 14 15 16 17 18 19 20 21 22
+
MAX240
44 43 42 41 40 39 38 37 36 35 34
N.C. SHDN EN T5OUT R4IN R4OUT T4IN T3IN R5OUT R5IN N.C.
38 T4IN +5V 2 T5IN 16 R1OUT
R2
23 24 25 26 27 28 29 30 31 32 33
N.C. N.C. C1+ V+ C1C2+ C2 VN.C. N.C. N.C.
R3
Plastic FP
R4
Figure 18. MAX240 Pin Configuration and Typical Operating Circuit
______________________________________________________________________________________
27
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
TOP VIEW
+5V INPUT 0.1F 0.1F
1 0.1F C1+ 1 V+ 2 C1- 3 C2+ 4 C2- 5 V- 6 T2OUT 7 R2IN 8
C1+
+
16 VCC 15 GND 14 T1OUT
3 C14 C2+ 5 C2-
16 VCC +5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER +5V 400k
V+
2
+10V
0.1F
V-
6
-10V 0.1F
MAX243
13 R1IN 12 R1OUT 11 T1IN 10 T2IN 9 R2OUT TTL/CMOS INPUTS 10 T2IN 11 T1IN +5V
T1OUT 14 RS-232 OUTPUTS T2OUT 7
400k
DIP/SO
12 R1OUT TTL/CMOS OUTPUTS 9 R2OUT RECEIVER INPUT -3V OPEN +3V R1 OUTPUT HIGH HIGH LOW R2 OUTPUT HIGH LOW LOW R1IN 13 5k R2IN 8 5k GND 15 RS-232 INPUTS
Figure 19. MAX243 Pin Configuration and Typical Operating Circuit
28
______________________________________________________________________________________
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
+5V
TOP VIEW
1F 21 TA4OUT TA3OUT TA2OUT TA1OUT TB1OUT TB2OUT TB3OUT TB4OUT RA4IN RA5IN RB5IN 1F 1F
6 5 4 3 2 1 44 43 42 41 40
1F 20 VCC +5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER +5V 400k +5V TB1OUT 44 TB1IN 30 +5V 400k 16 TA2IN 3 TA3OUT 17 TA3IN 4 TA4OUT 18 TA4IN 9 RA1IN 5k 10 RA1OUT 8 RA2IN 5k 11 RA2OUT 7 RA3IN 5k 12 RA3OUT 6 RA4IN 5k 13 RA4OUT 5 RA5IN 5k 14 RA5OUT GND 19 +5V 400k TB4IN 27 RB1IN 36 5k RB1OUT 35 RB2IN 37 5k RB2OUT 34 RB3IN 38 5k RB3OUT 33 RB4IN 39 5k RB4OUT 32 RB5IN 40 5k RB5OUT 31 +5V +5V 400k TB3IN 28 TB4OUT 41 +5V TB2IN 29 TB3OUT 42 +5V TB2OUT 43
C1+ 23 C124 C2+ 25 C22 TA1OUT 15 TA1IN 2 TA2OUT
22 V+ 26 V- 1F
+
RA3IN RA2IN RA1IN RA1OUT RA2OUT RA3OUT RA4OUT RA5OUT TA1IN TA2IN TA3IN
7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 39 RB4IN 38 RB3IN 37 RB2IN 36 RB1IN 35 RB1OUT
MAX244
34 RB2OUT 33 RB3OUT 32 RB4OUT 31 RB5OUT 30 TB1IN 29 TB2IN
TA4IN
V+
C1-
C2-
V-
TB4IN
PLCC
MAX249 FUNCTIONAL DESCRIPTION 10 RECEIVERS 5 A-SIDE RECEIVERS 5 B-SIDE RECEIVERS 8 TRANSMITTERS 4 A-SIDE TRANSMITTERS 4 B-SIDE TRANSMITTERS NO CONTROL PINS
Figure 20. MAX244 Pin Configuration and Typical Operating Circuit
______________________________________________________________________________________ 29
TB3IN
GND
C1+
C2+
VCC
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
+5V
TOP VIEW
1F 40 VCC 40 39 38 37 36 35 VCC ENT TB1IN TB2IN TB3IN TB4IN RB5OUT RB4OUT RB3OUT RB2OUT RB1OUT RB1IN RB2IN RB3IN RB4IN RB5IN TB1OUT TB2OUT TB3OUT TB4OUT 9 RA2OUT RB2OUT 31 RB3IN 27 5k RB3OUT 32 RB4IN 26 5k RB4OUT 33 RB5IN 25 5k RB5OUT 34 GND 20 13 RA3IN 5k 10 RA1OUT 12 RA2IN 5k RB1OUT 30 RB2IN 28 5k 11 RA1IN 5k RB1IN 29 5k 19 TA4OUT 5 TA4IN 1 ENR 18 TA3OUT 4 TA3IN +5V 400k TB4IN 35 ENT 39 +5V +5V 400k TB3IN 36 TB4OUT 21 +5V TB3OUT 22 17 TA2OUT 3 TA2IN +5V 400k TB2IN 37 +5V TB2OUT 23 16 TA1OUT 2 TA1IN +5V 400k TB1IN 38 +5V TB1OUT 24
ENR TA1IN TA2IN TA3IN TA4IN RA5OUT RA4OUT RA3OUT RA2OUT RA1OUT RA1IN RA2IN RA3IN RA4IN RA5IN TA1OUT TA2OUT TA3OUT TA4OUT GND
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
+
MAX245
34 33 32 31 30 29 28 27 26 25 24 23 22 21
DIP
MAX245 FUNCTIONAL DESCRIPTION 10 RECEIVERS 5 A-SIDE RECEIVERS (RA5 ALWAYS ACTIVE) 5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE) 8 TRANSMITTTERS 4 A-SIDE TRANSMITTERS 2 CONTROL PINS 1 RECEIVER ENABLE (ENR) 1 TRANSMITTER ENABLE (ENT)
8 RA3OUT 14 RA4IN 5k 7 RA4OUT 15 RA5IN 5k 6 RA5OUT
Figure 21. MAX245 Pin Configuration and Typical Operating Circuit
30 ______________________________________________________________________________________
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
+5V
TOP VIEW
1F 40 VCC +5V +5V 16 TA1OUT 400k 2 TA1IN +5V 17 TA2OUT 400k 3 TA2IN +5V 18 TA3OUT 400k 4 TA3IN +5V 19 TA4OUT 400k 5 TA4IN RA3IN RA4IN RA5IN TA1OUT TA2OUT TA3OUT TA4OUT GND 13 14 15 16 17 18 19 20 28 27 26 25 24 23 22 21 RB2IN 1 ENA RB3IN RB4IN RB5IN TB1OUT 10 RA1OUT TB2OUT TB3OUT TB4OUT 5k 9 RA2OUT 13 RA3IN 5k 8 RA3OUT 14 RA4IN 5k 7 RA4OUT 15 RA5IN 5k 6 RA5OUT GND 20 5k RB2OUT 31 RB3IN 27 5k RB3OUT 32 RB4IN 26 5k RB4OUT 33 RB5IN 25 5k RB5OUT 34 12 RA2IN RB1OUT 30 RB2IN 28 5k 5k 11 RA1IN ENB 39 RB1IN 29 TB4IN 35 +5V TB4OUT 21 TB3IN 36 +5V TB3OUT 22 TB2IN 37 +5V TB2OUT 23 TB1IN 38 TB1OUT 24
ENA TA1IN TA2IN TA3IN TA4IN RA5OUT RA4OUT RA3OUT RA2OUT RA1OUT RA1IN RA2IN
1 2 3 4 5 6 7 8 9 10 11 12
+
40 39 38 37 36 35
VCC ENB TB1IN TB2IN TB3IN TB4IN RB5OUT RB4OUT RB3OUT RB2OUT RB1OUT RB1IN
MAX246
34 33 32 31 30 29
DIP
MAX246 FUNCTIONAL DESCRIPTION 10 RECEIVERS 5 A-SIDE RECEIVERS (RA5 ALWAYS ACTIVE) 5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE) 8 TRANSMITTERS 4 A-SIDE TRANSMITTERS 4 B-SIDE TRANSMITTERS 2 CONTROL PINS ENABLE A-SIDE (ENA) ENABLE B-SIDE (ENB)
Figure 22. MAX246 Pin Configuration and Typical Operating Circuit
______________________________________________________________________________________ 31
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
+5V
TOP VIEW
1F 40 VCC +5V +5V 400k 2 TA1IN +5V 17 TA2OUT TB3IN TB4IN RB4OUT RB3OUT RB2OUT RB1OUT ENRB RB1IN RB2IN RB3IN RB4IN RB5IN TB1OUT TB2OUT 5k 19 20 22 21 TB3OUT TB4OUT 10 RA1OUT 13 RA2IN RB1OUT 31 RB2IN 28 5k RB2OUT 32 RB3IN 27 5k RB3OUT 33 RB4IN 26 5k RB4OUT 34 ENRB 30 GND 20 5k 12 RA1IN RB1IN 29 5k 19 TA4OUT 400k 5 TA4IN 6 RB5OUT TB4IN 35 RB5IN 25 18 TA3OUT 400k 4 TA3IN +5V +5V TB4OUT 21 TB3IN 36 3 TA2IN +5V +5V TB3OUT 22 400k TB2IN 37 +5V TB2OUT 23 TB1IN 38
ENTA TA1IN TA2IN TA3IN TA4IN RB5OUT RA4OUT RA3OUT RA2OUT RA1OUT ENRA RA1IN RA2IN RA3IN RA4IN TA1OUT TA2OUT TA3OUT TA4OUT GND
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
+
1 ENTA 40 39 38 37 36 35 VCC ENTB TB1IN TB2IN 16 TA1OUT
ENTB 39 TB1OUT 24
MAX247
34 33 32 31 30 29 28 27 26 25 24 23
DIP
5k
MAX247 FUNCTIONAL DESCRIPTION 9 RECEIVERS 4 A-SIDE RECEIVERS 5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE) 8 TRANSMITTERS 4 A-SIDE TRANSMITTERS 4 B-SIDE TRANSMITTERS 4 CONTROL PINS ENABLE RECEIVER A-SIDE (ENRA) ENABLE RECEIVER B-SIDE (ENRB) ENABLE RECEIVER A-SIDE (ENTA) ENABLE RECEIVER B-SIDE (ENTB)
9 RA2OUT 14 RA3IN 5k 8 RA3OUT 15 RA4IN 5k 7 RA4OUT 11 ENRA
Figure 23. MAX247 Pin Configuration and Typical Operating Circuit
32 ______________________________________________________________________________________
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
TOP VIEW
1F 21 TA4OUT TA3OUT TA2OUT TA1OUT TB1OUT TB2OUT TB3OUT TA4OUT RA3IN RA4IN RB4IN 1F 1F 20 VCC +5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER ENTB 27 +5V 1 TA1OUT RA2IN RA1IN ENRA RA1OUT RA2OUT RA3OUT RA4OUT TA1IN TA2IN TA3IN TA4IN
7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 39 RB3IN 38 RB2IN 37 RB1IN 36 ENRB 35 RB1OUT
+5V 1F
6
5
4
3
2
1
44 43 42 41 40
C1+ 23 C124 C2+ 25 C218 ENTA
V+ V-
22 26 1F
+
+5V TB1OUT 44
400k 14 TA1IN +5V 2 TA2OUT 400k 15 TA2IN +5V 3 TA3OUT 400k 16 TA3IN +5V 4 TA4OUT 400k 17 TA4IN TB4IN 28 +5V TB4OUT 41 TB3IN 29 +5V TB3OUT 42 TB2IN 30 +5V TB2OUT 43 TB1IN 31
MAX248
34 RB2OUT 33 RB3OUT 32 RB4OUT 31 TB1IN 30 TB2IN 29 TB3IN
ENTA
V+
C1-
C2-
V-
ENTB
TB4IN
GND
C1+
C2+
VCC
PLCC
8 RA1IN 5k
RB1IN 37 5k RB1OUT 35 RB2IN 38 5k RB2OUT 34 RB3IN 39 5k RB3OUT 33 RB4IN 40 5k RB4OUT 32 ENRB 36 GND 19
MAX248 FUNCTIONAL DESCRIPTION
8 RECEIVERS 4 A-SIDE RECEIVERS 4 B-SIDE RECEIVERS 8 TRANSMITTERS 4 A-SIDE TRANSMITTERS 4 B-SIDE TRANSMITTERS 4 CONTROL PINS ENABLE RECEIVER A-SIDE (ENRA) ENABLE RECEIVER B-SIDE (ENRB) ENABLE RECEIVER A-SIDE (ENTA) ENABLE RECEIVER B-SIDE (ENTB)
10 RA1OUT 7 RA2IN 5k 11 RA2OUT 6 RA3IN 5k 12 RA3OUT 5 RA4IN 5k 13 RA4OUT 9 ENRA
Figure 24. MAX248 Pin Configuration and Typical Operating Circuit
______________________________________________________________________________________ 33
+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
TOP VIEW
1F 21 TA3OUT TA2OUT TA1OUT TB1OUT TB2OUT TB3OUT RA3IN RA4IN RA5IN RB5IN RB4IN 1F 1F 20 VCC +5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER ENTB 27 +5V 1 TA1OUT RA2IN RA1IN ENRA RA1OUT RA2OUT RA3OUT RA4OUT RA5OUT TA1IN TA2IN TA3IN
7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 39 RB3IN 38 RB2IN 37 RB1IN 36 ENRB 35 RB1OUT
+5V 1F
6
5
4
3
2
1
44 43 42 41 40
C1+ 23 C124 C2+ 25 C218 ENTA
V+ V-
22 26 1F
+
+5V TB1OUT 44
400k 15 TA1IN +5V 2 TA2OUT 400k 16 TA2IN +5V 3 TA3OUT 400k 17 TA3IN 8 RA1IN 5k 10 RA1OUT 7 RA2IN 5k 11 RA2OUT 6 RA3IN 5k 12 RA3OUT 5 RA4IN 5k 13 RA4OUT 4 RA5IN 5k 14 RA5OUT 9 ENRA GND 19 TB3IN 28 RB1IN 37 5k RB1OUT 35 RB2IN 38 5k RB2OUT 34 RB3IN 39 5k RB3OUT 33 RB4IN 40 5k RB4OUT 32 RB5IN 41 5k RB5OUT 31 ENRB 36 +5V TB3OUT 42 TB2IN 29 +5V TB2OUT 43 TB1IN 30
MAX249
34 RB2OUT 33 RB3OUT 32 RB4OUT 31 RB5OUT 30 TB1IN 29 TB2IN
ENTA
V+
C1-
C2-
V-
ENTB
PLCC
MAX249 FUNCTIONAL DESCRIPTION 10 RECEIVERS 5 A-SIDE RECEIVERS 5 B-SIDE RECEIVERS 6 TRANSMITTERS 3 A-SIDE TRANSMITTERS 3 B-SIDE TRANSMITTERS 4 CONTROL PINS ENABLE RECEIVER A-SIDE (ENRA) ENABLE RECEIVER B-SIDE (ENRB) ENABLE RECEIVER A-SIDE (ENTA) ENABLE RECEIVER B-SIDE (ENTB)
Figure 25. MAX249 Pin Configuration and Typical Operating Circuit
34 ______________________________________________________________________________________
TB3IN
GND
C1+
C2+
VCC
+5V-Powered, Multichannel RS-232 Drivers/Receivers
___________________________________________Ordering Information (continued)
PART MAX222CPN+ MAX222CWN+ MAX222C/D MAX222EPN+ MAX222EWN+ MAX222EJN MAX222MJN MAX223CAI+ MAX223CWI+ MAX223C/D MAX223EAI+ MAX223EWI+ MAX225CWI+ MAX225EWI+ MAX230CPP+ MAX230CWP+ MAX230C/D MAX230EPP+ MAX230EWP+ MAX230EJP MAX230MJP MAX231CPD+ MAX231CWE+ MAX231CJD MAX231C/D MAX231EPD+ MAX231EWE+ MAX231EJD MAX231MJD MAX232CPE+ MAX232CSE+ MAX232CWE+ MAX232C/D MAX232EPE+ MAX232ESE+ MAX232EWE+ MAX232EJE MAX232MJE MAX232MLP+ MAX232ACPE+ MAX232ACSE+ MAX232ACWE+ TEMP RANGE 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -55C to +125C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C 0C to +70C -40C to +85C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -55C to +125C 0C to +70C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -55C to +125C 0C to +70C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -55C to +125C -55C to +125C 0C to +70C 0C to +70C 0C to +70C PIN-PACKAGE 18 Plastic DIP 18 Wide SO Dice* 18 Plastic DIP 18 Wide SO 18 CERDIP 18 CERDIP 28 SSOP 28 Wide SO Dice* 28 SSOP 28 Wide SO 28 Wide SO 28 Wide SO 20 Plastic DIP 20 Wide SO Dice* 20 Plastic DIP 20 Wide SO 20 CERDIP 20 CERDIP 14 Plastic DIP 16 Wide SO 14 CERDIP Dice* 14 Plastic DIP 16 Wide SO 14 CERDIP 14 CERDIP 16 Plastic DIP 16 Narrow SO 16 Wide SO Dice* 16 Plastic DIP 16 Narrow SO 16 Wide SO 16 CERDIP 16 CERDIP 20 LCC 16 Plastic DIP 16 Narrow SO 16 Wide SO PART MAX232AC/D MAX232AEPE+ MAX232AESE+ MAX232AEWE+ MAX232AEJE MAX232AMJE MAX232AMLP+ MAX233CPP+ MAX233EPP+ MAX233ACPP+ MAX233ACWP+ MAX233AEPP+ MAX233AEWP+ MAX234CPE+ MAX234CWE+ MAX234C/D MAX234EPE+ MAX234EWE+ MAX234EJE MAX234MJE MAX235CPG+ MAX235EPG+ MAX235EDG MAX235MDG MAX236CNG+ MAX236CWG+ MAX236C/D MAX236ENG+ MAX236EWG+ MAX236ERG MAX236MRG MAX237CNG+ MAX237CWG+ MAX237C/D MAX237ENG+ MAX237EWG+ MAX237ERG MAX237MRG MAX238CNG+ MAX238CWG+ MAX238C/D TEMP RANGE 0C to +70C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -55C to +125C -55C to +125C 0C to +70C -40C to +85C 0C to +70C 0C to +70C -40C to +85C -40C to +85C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -55C to +125C 0C to +70C -40C to +85C -40C to +85C -55C to +125C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -55C to +125C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -55C to +125C 0C to +70C 0C to +70C 0C to +70C PIN-PACKAGE Dice* 16 Plastic DIP 16 Narrow SO 16 Wide SO 16 CERDIP 16 CERDIP 20 LCC 20 Plastic DIP 20 Plastic DIP 20 Plastic DIP 20 Wide SO 20 Plastic DIP 20 Wide SO 16 Plastic DIP 16 Wide SO Dice* 16 Plastic DIP 16 Wide SO 16 CERDIP 16 CERDIP 24 Wide Plastic DIP 24 Wide Plastic DIP 24 Ceramic SB 24 Ceramic SB 24 Narrow Plastic DIP 24 Wide SO Dice* 24 Narrow Plastic DIP 24 Wide SO 24 Narrow CERDIP 24 Narrow CERDIP 24 Narrow Plastic DIP 24 Wide SO Dice* 24 Narrow Plastic DIP 24 Wide SO 24 Narrow CERDIP 24 Narrow CERDIP 24 Narrow Plastic DIP 24 Wide SO Dice*
MAX220-MAX249
+Denotes a lead(Pb)-free/RoHS-compliant package. *Contact factory for dice specifications. 35
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+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
___________________________________________Ordering Information (continued)
PART MAX238ENG+ MAX238EWG+ MAX238ERG MAX238MRG MAX239CNG+ MAX239CWG+ MAX239C/D MAX239ENG+ MAX239EWG+ MAX239ERG MAX239MRG MAX240CMH+ MAX240C/D MAX241CAI+ MAX241CWI+ MAX241C/D MAX241EAI+ MAX241EWI+ MAX242CAP+ MAX242CPN+ MAX242CWN+ MAX242C/D MAX242EPN+ MAX242EWN+ MAX242EJN MAX242MJN TEMP RANGE -40C to +85C -40C to +85C -40C to +85C -55C to +125C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -55C to +125C 0C to +70C 0C to +70C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C 0C to +70C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -55C to +125C PIN-PACKAGE 24 Narrow Plastic DIP 24 Wide SO 24 Narrow CERDIP 24 Narrow CERDIP 24 Narrow Plastic DIP 24 Wide SO Dice* 24 Narrow Plastic DIP 24 Wide SO 24 Narrow CERDIP 24 Narrow CERDIP 44 Plastic FP Dice* 28 SSOP 28 Wide SO Dice* 28 SSOP 28 Wide SO 20 SSOP 18 Plastic DIP 18 Wide SO Dice* 18 Plastic DIP 18 Wide SO 18 CERDIP 18 CERDIP PART MAX243CPE+ MAX243CSE+ MAX243CWE+ MAX243C/D MAX243EPE+ MAX243ESE+ MAX243EWE+ MAX243EJE MAX243MJE MAX244CQH+ MAX244C/D MAX244EQH+ MAX245CPL+ MAX245C/D MAX245EPL+ MAX246CPL+ MAX246C/D MAX246EPL+ MAX247CPL+ MAX247C/D MAX247EPL+ MAX248CQH+ MAX248C/D MAX248EQH+ MAX249CQH+ MAX249EQH+ TEMP RANGE 0C to +70C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -55C to +125C 0C to +70C 0C to +70C -40C to +85C 0C to +70C 0C to +70C -40C to +85C 0C to +70C 0C to +70C -40C to +85C 0C to +70C 0C to +70C -40C to +85C 0C to +70C 0C to +70C -40C to +85C 0C to +70C -40C to +85C PIN-PACKAGE 16 Plastic DIP 16 Narrow SO 16 Wide SO Dice* 16 Plastic DIP 16 Narrow SO 16 Wide SO 16 CERDIP 16 CERDIP 44 PLCC Dice* 44 PLCC 40 Plastic DIP Dice* 40 Plastic DIP 40 Plastic DIP Dice* 40 Plastic DIP 40 Plastic DIP Dice* 40 Plastic DIP 44 PLCC Dice* 44 PLCC 44 PLCC 44 PLCC
+Denotes a lead(Pb)-free/RoHS-compliant package. *Contact factory for dice specifications.
36
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+5V-Powered, Multichannel RS-232 Drivers/Receivers
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE 14 PDIP 16 PDIP 16 PDIP 16 PDIP 18 PDIP 20 PDIP 20 PDIP 24 PDIP 24 PDIP 28 PDIP 40 PDIP 40 PDIP 14 CERDIP 16 CERDIP 18 CERDIP 20 CERDIP 24 CERDIP 16 SO(N) 16 SO(N) 16 SO(W) 16 SO(W) 16 SO(W) 18 SO(W) 20 SO(W) 20 SO(W) 24 SO(W) 28 SO(W) 28 SO(W) 28 SO(W) 20 LCC 20 SSOP 24 SSOP 28 SSOP 16 TSSOP 16 FPCK 44 MQFP 44 PLCC 44 PLCC PACKAGE CODE P14+3 P16+1 P16+2 P16+3 P18+5 P20+3 P20M+1 N24+3 P24M+1 P28+2 P40+1 P40M+2 J14-3 J16-3 J18-2 J20-2 R24-4 S16+3 S16+5 W16+1 W16+2 W16+3 W18+1 W20+3 W20M+1 W24+2 W28+1 W28+2 W28M+1 L20+3 A20+1 A24+2 A28+1 U16+1 F16-3 M44+5 Q44+1 Q44+2 21-0013 21-0826 21-0049 21-0056 21-0658 90-0177 90-0094 90-0110 90-0095 90-0117 -- 90-0169 90-0236 37 90-0109 21-0042 90-0181 90-0108 90-0182 90-0107 21-0041 90-0097 21-0045 21-0044 -- 21-0043 OUTLINE NO. LAND PATTERN NO.
MAX220-MAX249
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+5V-Powered, Multichannel RS-232 Drivers/Receivers MAX220-MAX249
Revision History
REVISION NUMBER 15 REVISION DATE 1/06 DESCRIPTION Added part information to the lead temperature in the Absolute Maximum Ratings sections Changed multiple packages to lead-free versions; updated/added notes 3, 4, 5, 7, and 8 to the Electrical Characteristics table; removed incorrect subscripting from all pin names in the Electrical Characteristics table and Pin Configurations PAGES CHANGED 2, 5, 8
16
7/10
1, 2-9, 17-36
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
38 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2010 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.

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