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LT1039A/LT1039A-16 Triple RS232 Driver/Receiver with Shutdown
FEATURES
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DESCRIPTION
The LT (R)1039A is a triple RS232 driver/receiver that includes shutdown. Each receiver will accept up to 30V input and can drive either TTL or CMOS logic. The RS232 drivers accept TTL logic inputs and output RS232 voltage levels. The outputs are fully protected against overload and can be shorted to ground or up to 30V without damage to the drivers. Additionally, when the system is shut down or power is off, the outputs are in a high impedance state allowing data line sharing. On-chip ESD protection eliminates the need for external protection devices. A bias pin allows one receiver to be kept on while the rest of the part is shut down. The LT1039A is also available in the 16-pin version, without shutdown or bias pin functions. For applications requiring operation from a single 5V supply, see the LT1180A/LT1181A and LT1130A data sheets.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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On-Chip ESD Protection: 15kV Human Body Model 15kV IEC-1000-4-2 Air Gap Test** 8kV IEC-1000-4-2 Contact Test 125kBd Operation with 3k/2500pF Load 250kBd Operation with 3k/1000pF Load Operates from 5V to 15V Supplies Fully Protected Against Overload Outputs Can Be Driven 30V Without Damage Three-State Outputs; Outputs Open When Off Bipolar Circuit--No Latchup 30V Input Range Triple Driver/Receiver No Supply Current in Shutdown 30k Input Impedance Meets All RS232 Specifications 16-Pin Version--Pin Compatible with MC145406 Available in SO Package
APPLICATIONS
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RS232 Interface Terminals Modems
TYPICAL APPLICATION
12V BIAS* RS232 IN 50** RS232 OUT RS232 IN *BIAS PIN USED 50** TO KEEP THE RS232 OUT RECEIVER ON WHILE IN SHUTDOWN RS232 IN **50 RESISTORS MAY BE REQUIRED 50** FOR IEC-1000-4-2 RS232 OUT ESD PROTECTION DEPENDING UPON - 12V PC BOARD AND CONNECTOR LEAD LENGTH 1 2 3 30k 4 5 30k 6 7 30k 8 9 V- GND
1039A TA01
1039A TA02
V+
LT1039A
VCC
18 17 16
5V ON/OFF LOGIC
Driver Output Swing
OUTPUT VOLTAGE REFERRED TO SUPPLIES (V)
V
+
- 0.4 - 0.8 -1.2 -1.6 - 2.0
15 14
LOGIC LOGIC
13 12
LOGIC LOGIC
1.2 0.8 0.4 V- 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 OUTPUT CURRENT (mA)
11 10
LOGIC
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1
LT1039A/LT1039A-16
ABSOLUTE MAXIMUM RATINGS
Supply Voltage Driver (V +, V -) ................................................. 16V Receiver (VCC) ...................................................... 7V Logic Inputs .................................................. V - to 25V Receiver Inputs..................................................... 30V ON/OFF Input .............................................. GND to 12V Driver Outputs ............................. V - + 30V to V + - 30V Short-Circuit Duration ..................................... Indefinite Operating Temperature Range LT1039AC................................................ 0C to 70C LT1039AI ........................................... - 40C to 85C LT1039AM ....................................... - 55C to 125C Storage Temperature Range ................. - 65C to 150C Lead Temperature (Soldering, 10 sec).................. 300C
PACKAGE/ORDER INFORMATION
TOP VIEW V+ REC1 IN TR1 OUT REC2 IN TR2 OUT REC3 IN TR3 OUT V- 1 2 3 4 5 6 7 8 16 VCC 15 REC1 OUT 14 TR1 IN 13 REC2 OUT 12 TR2 IN 11 REC3 OUT 10 TR3 IN 9 GND
ORDER PART NUMBER LT1039ACN16 LT1039ACSW16 LT1039AIN16 LT1039AISW16 LT1039AMJ16 Consult Factory for Availability
J PACKAGE 16-LEAD CERDIP
N PACKAGE 16-LEAD PDIP
SW PACKAGE 16-LEAD PLASTIC SO WIDE
TJMAX = 150C, JA = 105C/ W, JC = 30C/ W (J) TJMAX = 125C, JA = 90C/ W, JC = 50C/ W (N) TJMAX = 125C, JA = 95C/ W, JC = 27C/ W (SW)
ELECTRICAL CHARACTERISTICS
PARAMETER Driver V + = 12V, V- = Output Voltage Swing CONDITIONS - 12V, VON/OFF = 2.5V (Note 1) Load = 3k to Ground Positive Negative Input Low Level (VOUT = High) Input High Level (VOUT = Low) VIN 2.0V VIN 0.8V Sourcing Current, VOUT = 0V Sinking Current, VOUT = 0V Shutdown (Notes 2, 3), VOUT = 18V, VIN = 0V Shutdown (Note 2) RL = 3k, CL = 51pF to 2500pF VOUT = Low
q q q q q q
Logic Input Voltage Levels Logic Input Current Output Short-Circuit Current Output Leakage Current Supply Leakage Current Slew Rate Supply Current
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TOP VIEW V+ BIAS REC1 IN TR1 OUT REC2 IN TR2 OUT REC3 IN TR3 OUT V- 1 2 3 4 5 6 7 8 9 18 VCC 17 ON/OFF 16 REC1 OUT 15 TR1 IN 14 REC2 OUT 13 TR2 IN 12 REC3 OUT 11 TR3 IN 10 GND N PACKAGE 18-LEAD PDIP
ORDER PART NUMBER LT1039ACN LT1039ACSW LT1039AIN LT1039AISW LT1039AMJ
J PACKAGE 18-LEAD CERDIP
SW PACKAGE 18-LEAD PLASTIC SO WIDE
TJMAX = 150C, JA = 88C/ W, JC = 22C/ W (J) TJMAX = 125C, JA = 79C/ W, JC = 36C/ W (N) TJMAX = 125C, JA = 90C/ W, JC = 26C/ W (SW)
MIN
TYP
MAX
UNITS
V + - 2.0 V - + 1.5 2.0
V + - 1.3 V - + 1.0 1.4 1.4 1 5 0.8 20 20
V V V V A A mA mA 200 100 30 5 A A V/s mA
20 - 15
30 - 30 10 1
4
15 1
LT1039A/LT1039A-16
ELECTRICAL CHARACTERISTICS
PARAMETER Prop Delay (tPLH) (tPHL) Receiver VCC = 5V, VON/OFF = 2.5V (Note 1) Input Voltage Thresholds Hysteresis Input Resistance Output Voltage Output Short-Circuit Current Output Leakage Current Supply Current Supply Leakage Current ON/OFF Pin Current Prop Delay (tPLH) (tPHL) The q denotes specifications which apply over the full operating temperature range. Note 1: VON/OFF = 5V for LT1039AM grade devices. Note 2: VON/OFF = 0.4V for - 55C TA 100C and VON/OFF = 0.2V for 100C TA 125C. Does not apply to LT1039A-16 part. Output Low, IOUT = - 1.6mA Output High, IOUT = 160A Sourcing Current, VOUT = VCC Sinking Current, VOUT = 0V Shutdown (Note 1), 0V VOUT VCC, VIN = 0V (Note 4) Shutdown (Note 2) 0V VON/OFF 5V Input Low Level (VOUT = High) Input High Level (VOUT = Low)
q q q q q q q q q q q q
CONDITIONS
MIN
TYP 0.6 0.8
MAX 1.2 1.2
UNITS s s V V V k V V mA mA
0.5 0.1
1.3 1.7 0.4 30 0.4 4.8 - 30 25 1 2 1
2.8 1.0 0.5
3.5 - 10 15
10 5 100 80 600 600
A mA A A ns ns
- 15 200 300
Note 3: For TA 100C leakage current is 350A max. Note 4: Bias pin open on 18-pin version.
TYPICAL PERFORMANCE CHARACTERISTICS
Driver Output Short-Circuit Current
50 45 40
OUTPUT CURRENT (mA) INPUT VOLTAGE (V)
35 30 25 20 15 10 5
SINKING
2.25 2.00 1.75 1.50 1.25 1.00 0.75
ON/OFF PIN VOLTAGE (V)
SOURCING
0 -55 -25
50 25 0 75 TEMPERATURE (C)
UW
100
1039A G01
Receiver Input Thresholds
3.00 2.75 2.50 INPUT HIGH 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 50 25 0 75 TEMPERATURE (C) 100 125
ON/OFF Pin Thresholds
MINIMUM ON VOLTAGE
INPUT LOW
MINIMUM OFF VOLTAGE
125
0.50 -55 -25
0 -55 -25
50 25 0 75 TEMPERATURE (C)
100
125
1039A G02
1039A G03
3
LT1039A/LT1039A-16 TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current in Shutdown
1000 SUPPLY CURRENT MEASURED INTO VCC AND V +
SUPPLY CURRENT (nA)
OUTPUT LEAKAGE CURRENT (A)
100
100
OUTPUT CURRENT (mA)
10
1 -55 -25
0 25 50 75 TEMPERATURE (C)
ON/OFF Pin Current vs Voltage
OUTPUT VOLTAGE REFERRED TO SUPPLIES (V)
40 35 30 INPUT CURRENT (A) 25 20 15 10 5 0 -5 -10 0 1 2 3 INPUT VOLTAGE (V) 4 5
1039A G07
Output Waveforms
RECEIVER OUTPUT DRIVER OUTPUT 5V 0V 10V 0V 0V DRIVER OUTPUT - 5V - 10V V + = 12V V - = -12V VCC = 5V RL = 3k 2s/DIV
1039A G09
-10V 5V INPUT 0V
DRIVER OUTPUT CONNECTED TO RECEIVER INPUT
4
UW
100
1039A G04
Driver Output Leakage in Shutdown
1000
60 55 50 45 40 35 30 25 20 15 10 5
Receiver Output Short-Circuit Current
SINKING
10
VOUT - 30V
SOURCING
VOUT 30V 1 -55 -25 0 25 50 75 TEMPERATURE (C) 100 125
125
0 -55 -25
50 25 0 75 TEMPERATURE (C)
100
125
1039A G05
1039A G06
Driver Output Swing vs Current
V+ - 0.4 - 0.8 -1.2 -1.6 - 2.0
1.2 0.8 0.4 V- 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 OUTPUT CURRENT (mA)
1039A TA02
Shutdown to Driver Output
10V DRIVER OUTPUT 5V 0V OUTPUT LOW
OUTPUT HIGH
ON/OFF INPUT
5V 0V V + = 12V V - = -12V RL = 3k 2s/DIV
1039A G10
LT1039A/LT1039A-16 TYPICAL PERFORMANCE CHARACTERISTICS
Shutdown to Receiver Output
6V RECEIVER 4V OUTPUT 2V 0V 6V RECEIVER 1 4V OUTPUT 2V 0V
ON/OFF 5V INPUT 0V VCC = 5V 2ms/DIV
1039A G11
PIN FUNCTIONS
(Pin numbers listed are for 18-pin device)
V +, V - (Pins 1, 9): Driver Supply Pins. Supply current drops to zero in shutdown mode. Driver outputs are in a high impedance state when V + and V - = 0V. BIAS (Pin 2): Keeps receiver 1 on while the LT1309A is in the shutdown mode. Leave BIAS pin open when not in use. See Applications Information for proper use. REC IN (Pins 3, 5, 7): Receiver Input Pins. Accepts RS232 voltage levels (30V) and has 0.4V of hysteresis to provide noise immunity. Input impedance is nominally 30k. Receiver input pins are internally protected from ESD transients. In order to insure proper functioning of the ESD protection devices, the VCC and V - supply pins must be bypassed with low ESR capacitors located close to the pins. A 0.1F ceramic capacitor works well. TR OUT (Pins 4, 6, 8): Driver Outputs with RS232 Voltage Levels. Outputs are in a high impedance state when in the shutdown mode or when power is off (V + and V - = 0V) to allow data line sharing. Outputs are fully short-circuit protected from V - + 30V to V + - 30V with power on, off or in the shutdown mode. Typical output breakdowns are greater than 45V and higher applied voltages will not damage the device if moderately current limited. Driver
UW
BIAS Pin Response Time
BIAS INPUT 5V (THRU 25k) 0V VCC = 5V 0.2s/DIV
1039A G12
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output pins are internally protected from ESD transients. In order to insure proper functioning of the ESD protection devices, the V + and V - supply pins must be bypassed with low ESR capacitors located close to the pins. 0.1F ceramic capacitors work well. GND (Pin 10): Ground Pin. TR IN (Pins 11, 13, 15): RS232 Driver Input Pins. Inputs are TTL/CMOS compatible. Inputs should not be allowed to float. Tie unused inputs to VCC. REC OUT (Pins 12, 14, 16): Receiver Outputs with TTL/ CMOS Voltage Levels. Outputs are in a high impedance state when in the shutdown mode to allow data line sharing. Outputs are fully short-circuit protected to ground or VCC with power on, off or in the shutdown mode. ON/OFF (Pin 17): Controls the operation mode of the LT1039A and is TTL/CMOS compatible. A logic low puts the device in the shutdown mode which reduces input supply current to zero and places both driver and receiver outputs in a high impedance state. VCC (Pin 18): 5V Power for Receivers.
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LT1039A/LT1039A-16
APPLICATIONS INFORMATION
The driver output stage of the LT1039A offers significantly improved protection over older bipolar and CMOS designs. In addition to current limiting, the driver output can be externally forced to 30V with no damage or excessive current flow.
LT1039A Driver
30V LT1039A OUTPUT CAN BE FORCED EXTERNALLY - 30V
1039A AI01
The driver outputs utilize high impedance overvoltage protection, eliminating the flow of fault currents into supplies, as will happen with conventional diode clamp configurations.
Older RS232 Drivers and Other CMOS Drivers
V+ WITH SOME DRIVERS, EXTERNALLY APPLIED VOLTAGE CAN FORCE THE SUPPLIES V-
1039A AI02
Placing the LT1039A in the shutdown mode (Pin 17 low) puts both the driver and receiver outputs in a high impedance state. This allows data line sharing and transceiver applications.
Sharing a Transmitter Line
LOGIC INPUT A
LT1039A #1 DRIVER
LOGIC INPUT B
LT1039A #2 DRIVER
RS232 TRANSMISSION LINE
LOGIC INVERTER ON/OFF (CHANNEL SELECT) INPUT
1039A AI03
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Sharing a Receiver Line
RS232 INPUT A
LT1039A #1 RECEIVER
RS232 INPUT B
LT1039A #2 RECEIVER
LOGIC OUTPUT
LOGIC INVERTER ON/OFF (CHANNEL SELECT) INPUT
1039A AI04
Transceiver
LOGIC TRANSMIT/RECEIVE LINE
LT1039A #1 DRIVER
RS232 TRANSMIT/RECEIVE LINE
LT1039A #2 RECEIVER
LOGIC INVERTER ON/OFF (TRANSMIT/RECEIVE) INPUT
1039A AI05
The shutdown mode also drops all supply currents (VCC, V +, V -) to zero for power conscious systems.
LT1039A/LT1039A-16
APPLICATIONS INFORMATION
When driving CMOS logic from a receiver that will be used in the shutdown mode and there is no other active receiver on the line, a 51k resistor can be placed from the logic input to VCC to force a definite logic level when the receiver output is in a high impedance state.
Driving CMOS Logic from a Receiver
VCC CMOS LOGIC
51k* RS232 INPUT LT1039A RECEIVER
LOGIC OUTPUT
ON/OFF INPUT
*FORCES LOGIC INPUT STATE WHEN VON/OFF IS LOW
To protect against receiver input overloads in excess of 30V, a voltage clamp can be placed on the data line and still maintain RS232 compatibility.
Input Overvoltage Protection
RS232 INPUT 1k 30V 5.6k 30V
1039A AI07
RECEIVER 30k LOGIC OUTPUT
The receiver input impedance of the LT1039A is nominally 30k. For applications requiring a 5k input impedance, a 5.6k resistor can be connected from the receiver input to ground.
5k Impedance Matching
RS232 INPUT 5.6k RECEIVER 30k LOGIC OUTPUT
1039A AI08
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Driver inputs should not be allowed to float. Any unused inputs should be tied to VCC. The BIAS pin is used to "keep alive" one receiver while in the shutdown mode (all other circuitry being inactive). This allows a system to be in shutdown and still have one active receiver for transferring data.
Keeping Alive One Receiver While in Shutdown
LOGIC SHUTDOWN INPUT 25k
1039A AI06
2 BIAS RS232 INPUT 3
ON/OFF
17 16 LOGIC OUTPUT
LT1039A
1039A AI07
It can also be used to make an RS232 compatible shutdown control line. Driving the BIAS pin low through a resistance of 24k to 30k keeps the receiver active. Do not drive the BIAS pin directly from a logic output without the series resistor. An unused BIAS pin should be left open.
RS232 Compatible Shutdown Control Line
25k
2 BIAS RS232 SHUTDOWN INPUT 3
ON/OFF
17 16
LT1039A
1039A AI08
7
LT1039A/LT1039A-16
PACKAGE DESCRIPTION
CORNER LEADS OPTION (4 PLCS)
0.023 - 0.045 (0.584 - 1.143) HALF LEAD OPTION 0.045 - 0.068 (1.143 - 1.727) FULL LEAD OPTION 0.300 BSC (0.762 BSC)
0.008 - 0.018 (0.203 - 0.457) 0.385 0.025 (9.779 0.635)
0 - 15
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS.
CORNER LEADS OPTION (4 PLCS)
0.023 - 0.045 (0.584 - 1.143) HALF LEAD OPTION 0.045 - 0.068 (1.143 - 1.727) FULL LEAD OPTION
0.300 BSC (0.762 BSC) 0.015 - 0.060 (0.380 - 1.520)
0.008 - 0.018 (0.203 - 0.457) 0.385 0.025 (9.779 0.635)
0 - 15
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS.
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Dimensions in inches (millimeters) unless otherwise noted. J Package 16-Lead CERDIP (Narrow 0.300, Hermetic)
(LTC DWG # 05-08-1110)
0.840 (21.336) MAX 16 15 14 13 12 11 10 9
0.005 (0.127) MIN
0.025 (0.635) RAD TYP 1 2 3 4 5 6 7 8
0.220 - 0.310 (5.588 - 7.874)
0.200 (5.080) MAX 0.015 - 0.060 (0.380 - 1.520)
0.125 (3.175) MIN
0.045 - 0.068 (1.143 - 1.727) 0.014 - 0.026 (0.360 - 0.660)
0.100 0.010 (2.540 0.254)
J16 0996
J Package 18-Lead CERDIP (Narrow 0.300, Hermetic)
(LTC DWG # 05-08-1110)
0.960 (24.384) MAX 18 17 16 15 14 13 12 11 10
0.005 (0.127) MIN
0.025 (0.635) RAD TYP 1 2 3 4 5 6 7 8 9
0.220 - 0.310 (5.590 - 7.870)
0.200 (5.080) MAX
0.125 (3.175) MIN
0.045 - 0.068 (1.143 - 1.727) 0.014 - 0.026 (0.360 - 0.660)
0.100 0.010 (2.540 0.254)
J18 0694
LT1039A/LT1039A-16
PACKAGE DESCRIPTION U
Dimensions in inches (millimeters) unless otherwise noted. N Package 16-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.770* (19.558) MAX 16 15 14 13 12 11 10 9
0.255 0.015* (6.477 0.381)
1 0.300 - 0.325 (7.620 - 8.255) 0.130 0.005 (3.302 0.127) 0.015 (0.381) MIN
2
3
4
5
6
7
8
0.045 - 0.065 (1.143 - 1.651)
0.009 - 0.015 (0.229 - 0.381)
0.065 (1.651) TYP 0.125 (3.175) MIN 0.005 (0.127) MIN 0.100 0.010 (2.540 0.254) 0.018 0.003 (0.457 0.076)
N16 0695
(
+0.025 0.325 -0.015 +0.635 8.255 -0.381
)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
N Package 18-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.900* (22.860) MAX 18 17 16 15 14 13 12 11 10
0.255 0.015* (6.477 0.381)
1 0.300 - 0.325 (7.620 - 8.255) 0.130 0.005 (3.302 0.127) 0.015 (0.381) MIN
2
3
4
5
6
7
8
9
0.045 - 0.065 (1.143 - 1.651)
0.009 - 0.015 (0.229 - 0.381)
0.065 (1.651) TYP 0.125 (3.175) MIN 0.018 0.003 (0.457 0.076)
N18 0695
0.005 (0.127) MIN 0.100 0.010 (2.540 0.254) *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
(
+0.025 0.325 -0.015 +0.635 8.255 -0.381
)
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LT1039A/LT1039A-16
PACKAGE DESCRIPTION
0.291 - 0.299** (7.391 - 7.595) 0.010 - 0.029 x 45 (0.254 - 0.737) 0 - 8 TYP
0.009 - 0.013 (0.229 - 0.330)
NOTE 1 0.016 - 0.050 (0.406 - 1.270)
NOTE: 1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS. THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
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Dimensions in inches (millimeters) unless otherwise noted.
SW Package 16-Lead Plastic Small Outline (Wide 0.300)
(LTC DWG # 05-08-1620)
0.398 - 0.413* (10.109 - 10.490) 16 15 14 13 12 11 10 9
NOTE 1
0.394 - 0.419 (10.007 - 10.643)
1 0.093 - 0.104 (2.362 - 2.642)
2
3
4
5
6
7
8 0.037 - 0.045 (0.940 - 1.143)
0.050 (1.270) TYP
0.004 - 0.012 (0.102 - 0.305)
S16 (WIDE) 0396
0.014 - 0.019 (0.356 - 0.482) TYP
LT1039A/LT1039A-16
PACKAGE DESCRIPTION U
Dimensions in inches (millimeters) unless otherwise noted. SW Package 18-Lead Plastic Small Outline (Wide 0.300)
(LTC DWG # 05-08-1620)
0.447 - 0.463* (11.354 - 11.760) 18 17 16 15 14 13 12 11 10
SEE NOTE
0.394 - 0.419 (10.007 - 10.643)
0.291 - 0.299** (7.391 - 7.595) 0.010 - 0.029 x 45 (0.254 - 0.737) 0 - 8 TYP
1 0.093 - 0.104 (2.362 - 2.642)
2
3
4
5
6
7
8
9 0.037 - 0.045 (0.940 - 1.143)
0.009 - 0.013 (0.229 - 0.330)
NOTE 1 0.016 - 0.050 (0.406 - 1.270)
0.050 (1.270) TYP
0.004 - 0.012 (0.102 - 0.305)
NOTE: 1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS. THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
0.014 - 0.019 (0.356 - 0.482) TYP
S18 (WIDE) 0396
Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
LT1039A/LT1039A-16
TYPICAL APPLICATION
LT1180A (Driver/Receiver with Power Supply) Driving an LT1039A
SHUTDOWN 5V 18 ON/OFF VCC LT1180A 17 18 VCC ON/OFF LT1039A 17
TTL IN TTL IN
TTL OUT 5k TTL OUT
+
0.1F
2 4
C1+ C1- C2+ C2- GND 16
+
0.1F
5 6
RELATED PARTS
PART NUMBER LTC 485 LT1137A LT1180A/81A LTC1345 LTC1348
(R)
DESCRIPTION Low Power RS485 Transceiver 5V 3 Driver/5 Receiver RS232 Transceiver 5V 2 Driver/2 Receiver RS232 Transceiver V.35 Transceiver 3.3V 3 Driver/5 Receiver RS232 Transceiver
12
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417 q (408) 432-1900 FAX: (408) 434-0507q TELEX: 499-3977 q www.linear-tech.com
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RS232 OUT RS232 OUT
TTL IN TTL IN TTL IN
RS232 OUT RS232 OUT RS232 OUT RS232 IN 30k
RS232 IN
TTL OUT
RS232 IN 5k
TTL OUT 30k TTL OUT
RS232 IN
RS232 IN 1 9 V+ V- GND 10
1039A TA03
V+ V-
3 7
30k
+
0.1F
+
0.1F
COMMENTS Industry Standard 15kV ESD Protection Industry Standard, 0.1F Capacitors Single 5V Supply Using 0.1F Capacitors Operates from 3.3V to 5V Supplies, 5 Receivers Active in Shutdown
1039af LT/TP 0697 2K * PRINTED IN USA
(c) LINEAR TECHNOLOGY CORPORATION 1997

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