View SP3223H_35893.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

(R)
SP3223H/3243H
High Speed Intelligent +3.0V to +5.5V RS-232 Transceivers
Meets true EIA/TIA-232-F Standards from a +3.0V to +5.5V power supply Interoperable with EIA/TIA-232 and adheres to EIA/TIA-562 down to a +2.7V power source Auto-OnlineTM circuitry automatically wakes up from a 1A shutdown Regulated Charge Pump Yields Stable RS-232 Outputs Regardless of VCC Variations ESD Specifications: +2kV Human Body Model 460 Kbps minimum transmission rate Ideal for High Speed RS-232 Applications
DESCRIPTION The SP3223H and 3243H products are RS-232 transceiver solutions intended for portable or hand-held applications such as notebook and palmtop computers. The "H" series is based on Sipex's SP3223/3243 series and has been enhanced for high speed. The data rate is improved to 460Kbps, easily meeting the demands of high speed RS-232 applications. The SP3223H and 3243H use an internal high-efficiency, charge-pump power supply that requires only 0.1F capacitors in 3.3V operation. This charge pump and Sipex's driver architecture allow the SP3223H/3243H series to deliver compliant RS-232 performance from a single power supply ranging from +3.3V to +5.0V. The SP3223H is a 2-driver/2-receiver device, and the SP3243H is a 3-driver/5-receiver device, ideal for laptop/notebook computer and PDA applications. The SP3243H includes one complementary receiver that remains alert to monitor an external device's Ring Indicate signal while the device is shutdown. The Auto-Online feature allows the device to automatically "wake-up" during a shutdown state when an RS-232 cable is connected and a connected peripheral is turned on. Otherwise, the device automatically shuts itself down drawing less than 1A.
SELECTION TABLE
Device SP3223H SP3243H Power Supplies +3.0V to +5.5V +3.0V to +5.5V RS-232 Drivers 2 3 RS-232 Receivers 2 5 External Components 4 capacitors 4 capacitors Auto-Online Circuitry YES YES TTL 3-State YES YES No. of Pins 20 28
Applicable U.S. Patents - 5,306,954; and other patents pending.
Rev. 6/30/03 SP3223H +3.0V to +5.5V RS-232 Transceivers (c) Copyright 2003 Sipex Corporation
1
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability and cause permanent damage to the device. VCC.......................................................-0.3V to +6.0V V+ (NOTE 1).......................................-0.3V to +7.0V V- (NOTE 1)........................................+0.3V to -7.0V V+ + |V-| (NOTE 1)...........................................+13V ICC (DC VCC or GND current).........................+100mA Input Voltages TxIN, ONLINE, SHUTDOWN, EN (SP3223H).................-0.3V to +6.0V RxIN...................................................................+15V Output Voltages TxOUT...............................................................+15V RxOUT, STATUS.......................-0.3V to (VCC + 0.3V) Short-Circuit Duration TxOUT.....................................................Continuous Storage Temperature......................-65C to +150C
Power Dissipation per package
20-pin PDIP (derate 16.0mW/oC above+70oC).....1300mW 20-pin SSOP (derate 9.25mW/oC above +70oC)....750mW 20-pin TSSOP (derate 11.1mW/oC above +70oC)..900mW 28-pin SOIC (derate 12.7mW/oC above +70oC)....1000mW 28-pin SSOP (derate 11.2mW/oC above +70oC).....900mW
NOTE 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
SPECIFICATIONS
Unless otherwise noted, the following specifications apply for VCC = +3.0V to +5.5V with TAMB = TMIN to TMAX. Typical values apply at VCC = +3.3V or +5.0V and TAMB = 25C.
PARAMETER DC CHARACTERISTICS Supply Current, Auto-Online 1.0 10 A All RxIN open, ONLINE = GND, SHUTDOWN = VCC, VCC = +3.3V, TAMB = +25 C SHUTDOWN = GND, VCC = +3.3V, TAMB = +25 C ONLINE = SHUTDOWN = VCC, no load, VCC = +3.3V, TAMB = +25 C MIN. TYP. MAX. UNITS CONDITIONS
Supply Current, Shutdown Supply Current, Auto-Online Disabled LOGIC INPUTS AND RECEIVER OUTPUTS Input Logic Threshold LOW HIGH Input Leakage Current Output Leakage Current Output Voltage LOW Output Voltage HIGH VCC - 0.6
1.0 0.3
10 1.0
A mA
0.8 2.0 +0.01 +0.05 +1.0 +10 0.4 VCC - 0.1
V A A V V
VCC = +3.3V or +5.0V, TxIN, EN (SP3223H), ONLINE, SHUTDOWN TxIN, EN, ONLINE, SHUTDOWN, TAMB = +25 C Receivers disabled IOUT = 1.6mA IOUT = -1.0mA
Rev. 6/30/03
SP3223H +3.0V to +5.5V RS-232 Transceivers
(c) Copyright 2003 Sipex Corporation
2
Unless otherwise noted, the following specifications apply for VCC = +3.0V to +5.5V with TAMB = TMIN to TMAX. Typical values apply at VCC = +3.3V or +5.0V and TAMB = 25C.
SPECIFICATIONS (continued)
PARAMETER DRIVER OUTPUTS Output Voltage Swing Output Resistance Output Short-Circuit Current Output Leakage Current
MIN.
TYP.
MAX.
UNITS
CONDITIONS
+5.0 300
+5.4
V
All driver outputs loaded with 3K to GND, TAMB = +25 C VCC = V+ = V- = 0V, VOUT = 2V VOUT = 0V VOUT = 15V VCC = 0V or 3.0V to 5.5V, VOUT = +12V, Drivers disabled
+35 +70
+60 +100 25
mA A
RECEIVER INPUTS Input Voltage Range Input Threshold LOW Input Threshold LOW Input Threshold HIGH Input Threshold HIGH Input Hysteresis Input Resistance 3 -15 0.6 0.8 1.2 1.5 1.5 1.8 0.3 5 7 2.4 2.4 15 V V V V V V k VCC = 3.3V VCC = 5.0V VCC = 3.3V VCC = 5.0V
Auto-Online CIRCUITRY CHARACTERISTICS (ONLINE = GND, SHUTDOWN = VCC)
STATUS Output Voltage LOW STATUS Output Voltage HIGH Receiver Threshold to Drivers Enabled (tONLINE) Receiver Positive or Negative Threshold to STATUS HIGH (tSTSH) Receiver Positive or Negative Threshold to STATUS LOW (tSTSL) VCC - 0.6 200 0.5 0.4 V V S S IOUT = 1.6mA IOUT = -1.0mA Figure 15 Figure 15
20
S
Figure 15
Rev. 6/30/03
SP3223H +3.0V to +5.5V RS-232 Transceivers
(c) Copyright 2003 Sipex Corporation
3
SPECIFICATIONS (continued)
Unless otherwise noted, the following specifications apply for VCC = +3.0V to +5.5V with TAMB = TMIN to TMAX. Typical values apply at VCC = +3.3V or +5.0V and TAMB = 25C.
PARAMETER TIMING CHARACTERISTICS Maximum Data Rate Receiver Propagation Delay tPHL tPLH Receiver Output Enable Time Receiver Output Disable Time Driver Skew Receiver Skew Transition-Region Slew Rate
MIN.
TYP.
MAX.
UNITS
CONDITIONS
460
Kbps s ns ns 100 1000 ns ns V/s
RL = 3K, CL = 1000pF, one driver active Receiver input to Receiver output, CL = 150pF Normal operation Normal operation | tPHL - tPLH | | tPHL - tPLH | VCC= 3.3V, RL = 3K, TAMB = 25oC, measurements taken from -3.0V to +3.0V or +3.0V to -3.0V
0.3 0.3 200 200 50 200 60
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for VCC = +3.3V, 235Kbps data rate, all drivers loaded with 3k, 0.1F charge pump capacitors, and TAMB = +25C.
14
6
12 10
Vout+ Vout-
Transmitter Output Voltage [V]
4 2 0 0 -2 -4 -6 Load Capacitance [pF] 500 1000 1500
Slew Rate [V/s]
8 6 4 2 0 0 500 1000 1500 Load Capacitance [pF] 2000 +Slew -Slew
Figure 1. Transmitter Output Voltage VS. Load Capacitance for the SP3223H
Figure 2. Slew Rate VS. Load Capacitance for the SP3223H
Rev. 6/30/03
SP3223H +3.0V to +5.5V RS-232 Transceivers
(c) Copyright 2003 Sipex Corporation
4
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Unless otherwise noted, the following performance characteristics apply for VCC = +3.3V, 235Kbps data rate, all drivers loaded with 3k, 0.1F charge pump capacitors, and TAMB = +25C.
40 35 30 25 20 15 10 5 118KHz 60KHz 10KHz
6
Transmitter Output Voltage [V]
Supply Current [mA]
4 2 0 0 -2 -4 -6 500 1000 1500 2000 2500 Vout+ Vout-
0 0 500 1000 1500 Load Capacitance [pF] 2000
Load Capacitance [pF]
Figure 3. Supply Current VS. Load Capacitance when Transmitting Data for the SP3223H
Figure 4. Transmitter Output Voltage VS. Load Capacitance for the SP3243H
16 14 12 10 8 6 4 2 0 0 500 1000 1500 2000 2500 3000 Load Capacitance [pF] + Slew - Slew
80 70 60 50 40 30 20 10 0 0 500 1000 1500 2000 2500 3000 Load Capacitance [pF] 118KHz 60KHz 10KHz
Figure 5. Slew Rate VS. Load Capacitance for the SP3243H
Figure 6. Supply Current VS. Load Capacitance when Transmitting Data for the SP3243H
Rev. 6/30/03
SP3223H +3.0V to +5.5V RS-232 Transceivers
Supply Current [mA]
Slew Rate [V/s]
(c) Copyright 2003 Sipex Corporation
5
PIN NUMBER NAME FUNCTION SP3223H EN C1+ V+ C1C2+ C2VR1IN R2IN R3IN R4IN R5IN R1OUT R2OUT R2OUT R3OUT R4OUT R5OUT STATUS T1IN T2IN T3IN ONLINE T1OUT T2OUT T3OUT GND VCC SHUTDOWN Receiver Enable. Apply logic LOW for normal operation. Apply logic HIGH to disable the receiver outputs (high-Z state). Positive terminal of the voltage doubler charge-pump capacitor. Regulated +5.5V output generated by the charge pump. Negative terminal of the voltage doubler charge-pump capacitor. Positive terminal of the inverting charge-pump capacitor. Negative terminal of the inverting charge-pump capacitor. Regulated -5.5V output generated by the charge pump. RS-232 receiver input. RS-232 receiver input. RS-232 receiver input. RS-232 receiver input. RS-232 receiver input. TTL/CMOS receiver output. TTL/CMOS receiver output. Non-inverting receiver-2 output, active in shutdown. TTL/CMOS receiver output. TTL/CMOS receiver output. TTL/CMOS receiver output. TTL/CMOS Output indicating online and shutdown status. TTL/CMOS driver input. TTL/CMOS driver input. TTL/CMOS driver input. Apply logic HIGH to override Auto-Online circuitry keeping drivers active (SHUTDOWN must also be logic HIGH, refer to Table 2). RS-232 driver output. RS-232 driver output. RS-232 driver output. Ground. +3.0V to +5.5V supply voltage. Apply logic LOW to shut down drivers and charge pump. This overrides all Auto-Online circuitry and ONLINE (refer to Table 2). 1 2 3 4 5 6 7 16 9 15 10 11 13 12 14 17 8 18 19 20 SP3243H 28 27 24 1 2 3 4 5 6 7 8 19 18 20 17 16 15 21 14 13 12 23 9 10 11 25 26 22
Table 1. Device Pin Description
Rev. 6/30/03 SP3223H +3.0V to +5.5V RS-232 Transceivers (c) Copyright 2003 Sipex Corporation
6
EN C1+ V+ C1C2+ C2VT2OUT R2IN
1 2 3 4 5 6 7 8 9 SP3223H
20 SHUTDOWN 19 VCC 18 GND 17 16 T1OUT R1IN
15 R1OUT 14 ONLINE
13 T1IN 12 T2IN 11 STATUS
R2OUT 10
Figure 7. SP3223H Pinout Configuration
C2+ 1 C2- 2 VR1IN R2IN R3IN R4IN 3 4 5 6 7 SP3243H
28 C1+ 27 26 25 24 V+ VCC GND C1-
23 ONLINE 22 SHUTDOWN 21 STATUS 20 19 18 17 16 15 R2OUT R1OUT R2OUT R3OUT R4OUT R5OUT
R5IN 8 T1OUT 9 T2OUT 10 T3OUT 11 T3IN 12 T2IN 13 T1IN 14
Figure 8. SP3243H Pinout Configuration
Rev. 6/30/03
SP3223H +3.0V to +5.5V RS-232 Transceivers
(c) Copyright 2003 Sipex Corporation
7
+3V to +5V
C5
+
0.1F 2 C1+ 0.1F 4 C15 C2+
19 VCC V+ 3 C3 + 0.1F
C1
+
C2
+
SP3223H
V-
7 C4 + 0.1F
0.1F
6 C213 T1IN T1OUT T2OUT 17 8
TTL/CMOS INPUTS
12 T2IN
RS-232 OUTPUTS
15 R1OUT TTL/CMOS OUTPUTS 10 R2OUT 5K 1 EN 20 14
To P Supervisor Circuit
R1IN 5K R2IN
16 RS-232 INPUTS 9
VCC
SHUTDOWN ONLINE STATUS GND 18
11
Figure 9. SP3223H Typical Operating Circuit
Rev. 6/30/03
SP3223H +3.0V to +5.5V RS-232 Transceivers
(c) Copyright 2003 Sipex Corporation
8
C5
+
VCC 0.1F 28 C1+ 0.1F 24 C11 C2+ 26 VCC V+ 27 C3 + 0.1F
C1
+
C2
+
SP3243H
V-
3 C4 + 0.1F
0.1F
2 C214 T1IN
T1OUT
9 RS-232 OUTPUTS
TTL/CMOS INPUTS
13 T2IN 12 T3IN 20 R2OUT 19 R1OUT 5K 18 R2OUT
T2OUT 10 T3OUT 11
R1IN R2IN
4 5 6 7 8 RS-232 INPUTS
TTL/CMOS OUTPUTS
5K 17 R3OUT 5K 16 R4OUT 5K 15
VCC
R3IN R4IN R5IN
R5OUT
22 23
5K
SHUTDOWN ONLINE
To P Supervisor Circuit
21 STATUS
GND 25
Figure 10. SP3243H Typical Operating Circuit
Rev. 6/30/03
SP3223H +3.0V to +5.5V RS-232 Transceivers
(c) Copyright 2003 Sipex Corporation
9
DESCRIPTION The SP3223H and SP3243H transceivers meet the EIA/TIA-232 and ITU-T V.28/V.24 communication protocols and can be implemented in battery-powered, portable, or hand-held applications such as notebook or palmtop computers. The SP3223H and SP3243H devices feature Sipex's proprietary and patented (U.S.-- 5,306,954) on-board charge pump circuitry that generates +5.5V RS-232 voltage levels from a single +3.0V to +5.5V power supply. The SP3223H and SP3243H devices can operate at a data rate of 460Kbps fully loaded. The SP3223H is a 2-driver/2-receiver device, and the SP3243H is a 3-driver/5-receiver device, ideal for portable or hand-held applications. The SP3243H includes one complementary always-active receiver that can monitor an external device (such as a modem) in shutdown. This aids in protecting the UART or serial controller IC by preventing forward biasing of the protection diodes where VCC may be disconnected.
The SP3223H and SP3243H series is an ideal choice for power sensitive designs. The SP3223H and SP3243H devices feature Auto-Online circuitry which reduces the power supply drain to a 1A supply current. In many portable or handheld applications, an RS-232 cable can be disconnected or a connected peripheral can be turned off. Under these conditions, the internal charge pump and the drivers will be shut down. Otherwise, the system automatically comes online. This feature allows design engineers to address power saving concerns without major design changes. THEORY OF OPERATION The SP3223H and SP3243H series is made up of four basic circuit blocks: 1. Drivers, 2. Receivers, 3. the Sipex proprietary charge pump, and 4. Auto-Online circuitry. Drivers The drivers are inverting level transmitters that convert TTL or CMOS logic levels to 5.0V EIA/ TIA-232 levels with an inverted sense relative to the input logic levels. Typically, the RS-232 output voltage swing is +5.4V with no load and +5V minimum fully loaded. The driver outputs are protected against infinite short-circuits to ground without degradation in reliability. These drivers comply with the EIA-TIA-232-F and all previous RS-232 versions. The drivers can guarantee a data rate over 460Kbps fully loaded with 3K in parallel with 1000pF, ensuring compatibility with PC-to-PC communication software. The slew rate of the driver output is internally limited to a maximum of 30V/s in order to meet the EIA standards (EIA RS-232D 2.1.7, Paragraph 5). The transition of the loaded output from HIGH to LOW also meets the monotonicity requirements of the standard.
VCC + 0.1F 28 C1+ 0.1F 24 C11 C2+ C2 + 0.1F 2 C214 T1IN 13 T2IN 12 T3IN 20 R2OUT 26 VCC V+ 27 C3 + 0.1F
C5
C1
+
SP3243H
V-
3 C4 + 0.1F
TxD RTS DTR
T1OUT
9 RS-232 OUTPUTS
T2OUT 10 T3OUT 11
UART or Serial C
RxD CTS DSR DCD RI
VCC
19 R1OUT 5K 18 R2OUT 5K 17 R3OUT 5K 16 R4OUT 5K 15 R5OUT 22 23 5K
SHUTDOWN ONLINE
R1IN 4 R2IN R3IN R4IN R5IN
5 6 7 8 RS-232 INPUTS
21 STATUS
GND 25
RESET
P Supervisor IC
VIN
Figure 11. Interface Circuitry Controlled by Microprocessor Supervisory Circuit
Rev. 6/30/03 SP3223H +3.0V to +5.5V RS-232 Transceivers (c) Copyright 2003 Sipex Corporation
10
DEVICE: SP3223H SHUTDOWN 0 0 1 1 DEVICE: SP3243H
VCC
+3V to +5V
EN 0 1 0 1
TXOUT High Z High Z Active Active
RXOUT Active
C5
+
0.1F 2 C1+ 0.1F 4 C15 C2+
19 VCC V+ 3 C3 + 0.1F
C1
+
C2
+
0.1F
SP3223H SP3243H
V-
7 C4 + 0.1F
High Z Active High Z
TTL/CMOS INPUTS
6 C2T1IN T1OUT
TXIN
TXOUT
R1OUT TTL/CMOS OUTPUTS RXOUT 1 EN 20 14 SHUTDOWN ONLINE STATUS GND 18 5K 5K
R1IN
RXIN
1000pF 1000pF
SHUTDOWN 0 1
TXOUT High Z Active
RXOUT High Z Active
R2OUT Active Active
To P Supervisor Circuit
11
Table 2. SHUTDOWN and EN Truth Tables Note: In Auto-Online Mode where ONLINE = GND and SHUTDOWN = VCC, the device will shut down if there is no activity present at the Receiver inputs.
Figure 12. Loopback Test Circuit for RS-232 Driver Data Transmission Rates
The SP3223H and SP3243H drivers can maintain high data rates over 460Kbps fully loaded. Figure 12 shows a loopback test circuit used to test the RS-232 Drivers. Figure 13 shows the test results of the loopback circuit with all three drivers active at 120Kbps with typical RS-232 loads in parallel with 1000pF capacitors. Figure 14 shows the test results where one driver was active at 1Mbps and all three drivers loaded with an RS-232 receiver in parallel with a 1000pF
capacitor. A superior RS-232 data transmission rate of 1Mbps makes the SP3223H/3243H series an ideal match for high speed LAN and personal computer peripheral applications. Receivers The receivers convert +5.0V EIA/TIA-232 levels to TTL or CMOS logic output levels. All receivers have an inverting output that can be disabled by using the EN pin. Receivers are active when the Auto-Online
Figure 13. Loopback Test Circuit 1 Driver Fully Loaded
Rev. 6/30/03
Figure 14. Loopback Test Circuit (All Drivers Fully Loaded)
(c) Copyright 2003 Sipex Corporation
SP3223H +3.0V to +5.5V RS-232 Transceivers
11
circuitry is enabled or when in shutdown. During the shutdown, the receivers will continue to be active. If there is no activity present at the receivers for a period longer than 100s or when SHUTDOWN is enabled, the device goes into a standby mode where the circuit draws 1A. Driving EN to a logic HIGH forces the outputs of the receivers into high-impedance. The truth table logic of the SP3223H and SP3243H driver and receiver outputs can be found in Table 2. The SP3243H includes an additional non-inverting receiver with an output R2OUT. R2OUT is an extra output that remains active and monitors activity while the other receiver outputs are forced into high impedance. This allows Ring Indicator (RI) from a peripheral to be monitored without forward biasing the TTL/CMOS inputs of the other devices connected to the receiver outputs. Since receiver input is usually from a transmission line where long cable lengths and system interference can degrade the signal, the inputs have a typical hysteresis margin of 300mV. This ensures that the receiver is virtually immune to noisy transmission lines. Should an input be left unconnected, an internal 5K pulldown resistor to ground will commit the output of the receiver to a HIGH state. Charge Pump The charge pump is a Sipex-patented design (U.S. 5,306,954) and uses a unique approach compared to older less-efficient designs. The charge pump still requires four external capacitors, but uses a four-phase voltage shifting technique to attain symmetrical 5.5V power supplies. The internal power supply consists of a regulated dual charge pump that provides output voltages 5.5V regardless of the input voltage (VCC) over the +3.0V to +5.5V range. This is important to maintain compliant RS-232 levels regardless of power supply fluctuations.
The charge pump operates in a discontinuous mode using an internal oscillator. If the output voltages are less than a magnitude of 5.5V, the charge pump is enabled. If the output voltages exceed a magnitude of 5.5V, the charge pump is disabled. This oscillator controls the four phases of the voltage shifting. A description of each phase follows. Phase 1 -- VSS charge storage -- During this phase of the clock cycle, the positive side of capacitors C1 and C2 are initially charged to VCC. Cl+ is then switched to GND and the charge in C1- is transferred to C2-. Since C2+ is connected to VCC, the voltage potential across capacitor C2 is now 2 times VCC. Phase 2 -- VSS transfer -- Phase two of the clock connects the negative terminal of C2 to the VSS storage capacitor and the positive terminal of C2 to GND. This transfers a negative generated voltage to C 3. This generated voltage is regulated to a minimum voltage of -5.5V. Simultaneous with the transfer of the voltage to C3, the positive side of capacitor C1 is switched to VCC and the negative side is connected to GND. Phase 3 -- VDD charge storage -- The third phase of the clock is identical to the first phase -- the charge transferred in C1 produces -VCC in the negative terminal of C1, which is applied to the negative side of capacitor C2. Since C2+ is at VCC, the voltage potential across C2 is 2 times VCC. Phase 4 -- VDD transfer -- The fourth phase of the clock connects the negative terminal of C2 to GND, and transfers this positive generated voltage across C2 to C4, the VDD storage capacitor. This voltage is regulated to +5.5V. At this voltage, the internal oscillator is disabled. Simultaneous with the transfer of the voltage to C4, the positive side of capacitor C1 is switched to VCC and the negative side is connected to GND, allowing the charge pump cycle to begin again. The charge pump cycle will continue as long as the operational conditions for the internal oscillator are present.
Rev. 6/30/03
SP3223H +3.0V to +5.5V RS-232 Transceivers
(c) Copyright 2003 Sipex Corporation
12
Since both V+ and V- are separately generated from VCC, in a no-load condition V+ and V- will be symmetrical. Older charge pump approaches that generate V- from V+ will show a decrease in the magnitude of V- compared to V+ due to the inherent inefficiencies in the design.
The clock rate for the charge pump typically operates at 250kHz. The external capacitors can be as low as 0.1F with a 16V breakdown voltage rating.
RECEIVER +2.7V 0V RS-232 INPUT VOLTAGES -2.7V VCC STATUS 0V
S H U T D O W N
tSTSL tSTSH tONLINE
+5V DRIVER RS-232 OUTPUT VOLTAGES 0V -5V
Figure 15. Auto-Online Timing Waveforms
Rev. 6/30/03
SP3223H +3.0V to +5.5V RS-232 Transceivers
(c) Copyright 2003 Sipex Corporation
13
VCC = +5V
+5V C1
+ -
C4
+ - +
C2
+ - -
VDD Storage Capacitor VSS Storage Capacitor
-5V
-5V
C3
Figure 16. Charge Pump -- Phase 1
VCC = +5V
C4
+ - +
C1
+ -
C2
+ - -
VDD Storage Capacitor VSS Storage Capacitor
-10V
C3
Figure 17. Charge Pump -- Phase 2
[ T ] +6V a) C2+
1 2 2
T
0V 0V
b) C2T -6V Ch1 2.00V Ch2 2.00V M 1.00s Ch1 1.96V
Figure 18. Charge Pump Waveforms
VCC = +5V
+5V C1
+ -
C4
+ - +
C2
+ - -
VDD Storage Capacitor VSS Storage Capacitor
-5V
-5V
C3
Figure 19. Charge Pump -- Phase 3
VCC = +5V
+10V C1
+ -
C4
+ - +
C2
+ - -
VDD Storage Capacitor VSS Storage Capacitor
C3
Figure 20. Charge Pump -- Phase 4
Rev. 6/30/03 SP3223H +3.0V to +5.5V RS-232 Transceivers (c) Copyright 2003 Sipex Corporation
14
6
Transmitter Output Voltage [V]
4 2 0 -2 -4 -6 Load Current Per Transmitter [mA] Vout+ Vout0.869 0.939 0.62 1.02 1.12 1.23 1.38 1.57 1.82 2.67 3.46 4.93 8.6
Figure 21. SP3243H Driver Output Voltages vs. Load Current per Transmitter
C5
+
VCC
0.1F 28 C1+ 0.1F 24 C11 C2+
26 VCC V+ 27 C3 + 0.1F
C1
+
SP3243H
C2
+
V- 3 C4 + 0.1F
0.1F
2 C214 T1IN 13 T2IN 12 T3IN 20 R2OUT 19 R1OUT 5K 18 R2OUT 5K 17 R3OUT 5K 16 R4OUT 5K 15 R5OUT
R5IN R4IN 7 R3IN R2IN 5 R1IN 4 T1OUT
9
T2OUT 10 T3OUT 11
6
8
VCC
22 23
5K
SHUTDOWN ONLINE
DB-9 Connector 6 7 8 9 1 2 3 4 5
To P Supervisor Circuit
21 STATUS
GND 25
DB-9 Connector Pins: 1. Received Line Signal Detector 2. Received Data 3. Transmitted Data 4. Data Terminal Ready 5. Signal Ground (Common)
6. 7. 8. 9.
DCE Ready Request to Send Clear to Send Ring Indicator
Figure 22. Circuit for the connectivity of the SP3243H with a DB-9 connector
Rev. 6/30/03 SP3223H +3.0V to +5.5V RS-232 Transceivers (c) Copyright 2003 Sipex Corporation
15
RS-232 SIGNAL AT RECEIVER INPUT
SHUTDOWN INPUT
ONLINE INPUT
STATUS OUTPUT
TRANSCEIVER STATUS Normal Operation Normal Operation Shutdown (Auto-Online) Shutdown Shutdown
YES NO NO YES NO
Table 3. Auto-Online Logic
HIGH HIGH HIGH LOW LOW
HIGH LOW -
HIGH LOW LOW HIGH LOW
Inactive Detection Block
RXINACT
RXIN
RS-232 Receiver Block
RXOUT
Figure 23. Stage I of Auto-Online Circuitry
Delay Stage
Delay Stage
Delay Stage
Delay Stage
Delay Stage
STATUS
R1INACT R2INACT R3INACT R4INACT R5INACT
SHUTDOWN
Figure 24. Stage II of Auto-Online Circuitry
Rev. 6/30/03
SP3223H +3.0V to +5.5V RS-232 Transceivers
(c) Copyright 2003 Sipex Corporation
16
Auto-Online Circuitry
The SP3223H and SP3243H devices have a patent pending Auto-Online circuitry on board that saves power in applications such as laptop computers, palmtop (PDA) computers and other portable systems. The SP3223H and SP3243H devices incorporate an Auto-Online circuit that automatically enables itself when the external transmitters are enabled and the cable is connected. Conversely, the Auto-Online circuit also disables most of the internal circuitry when the device is not being used and goes into a standby mode where the device typically draws 1A. This function can also be externally controlled by the ONLINE pin. When this pin is tied to a logic LOW, the Auto-Online function is active. Once active, the device is enabled until there is no activity on the receiver inputs. The receiver input typically sees at least +3V, which are generated from the transmitters at the other end of the cable with a +5V minimum. When the external transmitters are disabled or the cable is disconnected, the receiver inputs will be pulled down by their internal 5k resistors to ground. When this occurs over a period of time, the internal transmitters will be disabled and the device goes into a shutdown or standy mode. When ONLINE is HIGH, the Auto-Online mode is disabled. The Auto-Online circuit has two stages: 1) Inactive Detection 2) Accumulated Delay The first stage, shown in Figure 23, detects an inactive input. A logic HIGH is asserted on RXINACT if the cable is disconnected or the external transmitters are disabled. Otherwise, RXINACT will be at a logic LOW. This circuit is duplicated for each of the other receivers.
The second stage of the Auto-Online circuitry, shown in Figure 24, processes all the receiver's RXINACT signals with an accumulated delay that disables the device to a 1A supply current. The STATUS pin goes to a logic LOW when the cable is disconnected, the external transmitters are disabled, or the SHUTDOWN pin is invoked. The typical accumulated delay is around 20s. When the SP3223H and SP3243H drivers or internal charge pump are disabled, the supply current is reduced to 1A. This can commonly occur in hand-held or portable applications where the RS-232 cable is disconnected or the RS-232 drivers of the connected peripheral are turned off. The Auto-Online mode can be disabled by the SHUTDOWN pin. If this pin is a logic LOW, the Auto-Online function will not operate regardless of the logic state of the ONLINE pin. Table 3 summarizes the logic of the Auto-Online operating modes. The truth table logic of the SP3223H and SP3243H driver and receiver outputs can be found in Table 2. The STATUS pin outputs a logic LOW signal if the device is shutdown. This pin goes to a logic HIGH when the external transmitters are enabled and the cable is connected. When the SP3223H and SP3243H devices are shut down, the charge pumps are turned off. V+ charge pump output decays to VCC, the V- output decays to GND. The decay time will depend on the size of capacitors used for the charge pump. Once in shutdown, the time required to exit the shut down state and have valid V+ and V- levels is typically 200s. For easy programming, the STATUS can be used to indicate DTR or a Ring Indicator signal. Tying ONLINE and SHUTDOWN together will bypass the Auto-Online circuitry so this connection acts like a shutdown input pin.
Rev. 6/30/03
SP3223H +3.0V to +5.5V RS-232 Transceivers
(c) Copyright 2003 Sipex Corporation
17
ESD TOLERANCE The SP3223H/3243H series incorporates ruggedized ESD cells on all driver output and receiver input pins. The ESD structure is improved over our previous family for more rugged applications and environments sensitive to electro-static discharges and associated transients. The Human Body Model has been the generally accepted ESD testing method for semiconductors. This method is also specified in MIL-STD-883, Method 3015.7 for ESD testing.
The premise of this ESD test is to simulate the human body's potential to store electro-static energy and discharge it to an integrated circuit. The simulation is performed by using a test model as shown in Figure 25. This method will test the IC's capability to withstand an ESD transient during normal handling such as in manufacturing areas where the ICs tend to be handled frequently. For the Human Body Model, the current limiting resistor (RS) and the source capacitor (CS) are 1.5k an 100pF, respectively.
RS S
RC C SW1
DC Power Source
SW2 CS S
Device Under Test
Figure 25. ESD Test Circuit for Human Body Model
Rev. 6/30/03
SP3223H +3.0V to +5.5V RS-232 Transceivers
(c) Copyright 2003 Sipex Corporation
18
PACKAGE: PLASTIC DUAL-IN-LINE (NARROW)
E1 E
D1 = 0.005" min. (0.127 min.) D
A1 = 0.015" min. (0.381min.) A = 0.210" max. (5.334 max). A2 C O eA = 0.300 BSC (7.620 BSC) L
e = 0.100 BSC (2.540 BSC)
B1 B
ALTERNATE END PINS (BOTH ENDS)
DIMENSIONS (Inches) Minimum/Maximum (mm) A2 B B1 C D E E1 L O
16-PIN 0.115/0.195 (2.921/4.953) 0.014/0.022 (0.356/0.559) 0.045/0.070 (1.143/1.778) 0.008/0.014 (0.203/0.356)
20-PIN 0.115/0.195 (2.921/4.953) 0.014/0.022 (0.356/0.559) 0.045/0.070 (1.143/1.778) 0.008/0.014 (0.203/0.356)
28-PIN 0.068/0.078 (1.73/1.99) 0.002/0.008 (0.05/0.21) 0.010/0.015 (0.25/0.38) 0.397/0.407 (10.07/10.33) 0.205/0.212 (5.20/5.38) 0.0256 BSC (0.65 BSC) 0.301/0.311 (7.65/7.90) 0.022/0.037 (0.55/0.95) 0/8 (0/8)
0.980/1.060 0.780/0.800 (19.812/20.320) (24.892/26.924) 0.300/0.325 (7.620/8.255) 0.240/0.280 (6.096/7.112) 0.115/0.150 (2.921/3.810) 0/ 15 (0/15) 0.300/0.325 (7.620/8.255) 0.240/0.280 (6.096/7.112) 0.115/0.150 (2.921/3.810) 0/ 15 (0/15)
Rev. 6/30/03
SP3223H +3.0V to +5.5V RS-232 Transceivers
(c) Copyright 2003 Sipex Corporation
19
PACKAGE: PLASTIC SHRINK SMALL OUTLINE (SSOP)
E H
D A O e B A1 L
DIMENSIONS (Inches) Minimum/Maximum (mm) A A1 B D E e H L O
16-PIN 0.068/0.078 (1.73/1.99) 0.002/0.008 (0.05/0.21) 0.010/0.015 (0.25/0.38) 0.239/0.249 (6.07/6.33) 0.205/0.212 (5.20/5.38) 0.0256 BSC (0.65 BSC) 0.301/0.311 (7.65/7.90) 0.022/0.037 (0.55/0.95) 0/8 (0/8)
20-PIN 0.068/0.078 (1.73/1.99) 0.002/0.008 (0.05/0.21) 0.010/0.015 (0.25/0.38) 0.278/0.289 (7.07/7.33) 0.205/0.212 (5.20/5.38) 0.0256 BSC (0.65 BSC) 0.301/0.311 (7.65/7.90) 0.022/0.037 (0.55/0.95) 0/8 (0/8)
24-PIN 0.068/0.078 (1.73/1.99) 0.002/0.008 (0.05/0.21) 0.010/0.015 (0.25/0.38) 0.317/0.328 (8.07/8.33) 0.205/0.212 (5.20/5.38) 0.0256 BSC (0.65 BSC) 0.301/0.311 (7.65/7.90) 0.022/0.037 (0.55/0.95) 0/8 (0/8)
28-PIN 0.068/0.078 (1.73/1.99) 0.002/0.008 (0.05/0.21) 0.010/0.015 (0.25/0.38) 0.397/0.407 (10.07/10.33) 0.205/0.212 (5.20/5.38) 0.0256 BSC (0.65 BSC) 0.301/0.311 (7.65/7.90) 0.022/0.037 (0.55/0.95) 0/8 (0/8)
Rev. 6/30/03
SP3223H +3.0V to +5.5V RS-232 Transceivers
(c) Copyright 2003 Sipex Corporation
20
PACKAGE: PLASTIC SMALL OUTLINE (SOIC) (WIDE)
E H
D A O e B A1 L
DIMENSIONS (Inches) Minimum/Maximum (mm) A A1 B D E e H L O
28-PIN 0.093/0.104 (2.352/2.649) 0.004/0.012 (0.102/0.300) 0.013/0.020 (0.330/0.508) 0.697/0.713 (17.70/18.09) 0.291/0.299 (7.402/7.600) 0.050 BSC (1.270 BSC) 0.394/0.419 (10.00/10.64) 0.016/0.050 (0.406/1.270) 0/8 (0/8)
Rev. 6/30/03
SP3223H +3.0V to +5.5V RS-232 Transceivers
(c) Copyright 2003 Sipex Corporation
21
PACKAGE:
PLASTIC THIN SMALL OUTLINE (TSSOP)
E2 E
D A O e B A1 L
DIMENSIONS in inches (mm) Minimum/Maximum A A1 B D E e E2 L O
20-PIN - /0.043 (- /1.10) 0.002/0.006 (0.05/0.15) 0.007/0.012 (0.19/0.30) 0.252/0.260 (6.40/6.60) 0.169/0.177 (4.30/4.50) 0.026 BSC (0.65 BSC) 0.126 BSC (3.20 BSC) 0.020/0.030 (0.50/0.75) 0/8
Rev. 6/30/03
SP3223H +3.0V to +5.5V RS-232 Transceivers
(c) Copyright 2003 Sipex Corporation
22
ORDERING INFORMATION

Please consult the factory for pricing and availability on a Tape-On-Reel option.
Corporation
ANALOG EXCELLENCE
Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600
Sales Office 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.
Rev. 6/30/03
SP3223H +3.0V to +5.5V RS-232 Transceivers
(c) Copyright 2003 Sipex Corporation
23

SP3243HCT SP3243HCA
0C to +70C 0C to +70C

Model SP3223HCP SP3223HCA SP3223HCY
Temperature Range 0C to +70C 0C to +70C 0C to +70C
Package Types 20-pin PDIP 20-pin SSOP 20-pin TSSOP
28-pin Wide SOIC 28-pin SSOP

▲Up To Search▲

Price & Availability of SP3223H

	To Download SP3223H Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .