LT1032 Quad Low Power Line Driver U FEATURES ■ ■ ■ ■ ■ ■ ■ ■ DESCRIPTIO Low Operating Voltage: ±5V to ±15V 500µA Supply Current Zero Supply Current when Shut Down Outputs Can Be Driven ±30V Thermal Limiting Output “Open” when Off (Three-State) 10mA Output Drive Pinout Similar to 1488 U APPLICATIO S ■ ■ ■ ■ RS232 Power Supply Inverter Micropower Interface Level Translator The LT®1032 is a RS232 and RS423 line driver that operates over a ±5V to ±15V range on low supply current and can be shut down to zero supply current. Outputs are fully protected from externally applied voltages of ±30V by both current and thermal limiting. Since the output swings to within 200mV of the positive supply and 600mV of the negative supply, power supply needs are minimized. Also included is a strobe pin to force all outputs low independent of input or shutdown conditions. Further, slew rate can be adjusted with a resistor connected to the supply. A major advantage of the LT1032 is the high impedance output state when off or powered down. For applications requiring dual or triple RS232 driver/ receiver devices, see the LT1180A (dual), LT1039A (triple) or the LT1130A data sheets. , LTC and LT are registered trademarks of Linear Technology Corporation. U TYPICAL APPLICATIO Output Swing vs Output Current –6V 1 LT1032 14 2 13 3 OUTPUT ON/OFF 4 (0V TO 5V)† 5 INPUT 6 OUTPUT 7 GND 12 INPUT 6V STROBE* INPUT 11 OUTPUT 10 RESPONSE TIME CONTROL* 9 INPUT 8 OUTPUT *NO CONNECTION NEEDED WHEN NOT USED † 5V = ON LT1032 • TA01 OUTPUT VOLTAGE REFERRED TO SUPPLIES (V) RS232 Line Driver V+ 0.2 VOUT HIGH 0.4 VOUT LOW 1.0 0.8 0.6 0.4 0.2 V– 0 2 6 8 4 OUTPUT CURRENT (mA) 10 LT1032 • TA02 1 LT1032 W W W AXI U U ABSOLUTE RATI GS (Note 1) Supply Voltage ..................................................... ±15V Logic Input Pins ............................................ V – to 25V ON/OFF Pin ................................................. GND to 15V Output (Forced) ............................. V – + 30V, V + – 30V Response Pin ......................................................... ±6V Short-Circuit Duration (to ±30V) .................... Indefinite Storage Temperature Range ................ – 65°C to 150°C Operating Temperature Range LT1032C ............................................... 0°C to 70°C LT1032I ........................................... – 40°C to 85°C LT1032M ....................................... – 55°C to 125°C C Grade Guaranteed Functional by Design .............................. – 25°C to 85°C Lead Temperature (Soldering, 10 sec)................. 300°C U W U PACKAGE/ORDER I FOR ATIO TOP VIEW VEE (–15V TO –5V) ON/OFF (0V TO 5V) 14 2 13 STROBE 3 12 4 11 (5V TO 15V) 6 RESPONSE 10 CONTROL 9 7 8 5 GND VCC 1 J PACKAGE 14-LEAD CERDIP ORDER PART NUMBER ORDER PART NUMBER TOP VIEW 16 VCC VEE 1 LT1032CJ LT1032CN LT1032IN LT1032MJ 2 15 STROBE 3 14 ON/OFF 4 13 12 RESPONSE CONTROL 11 5 6 N PACKAGE 14-LEAD PDIP GND 7 10 NC 8 9 LT1032CSW LT1032ISW NC SW PACKAGE 16-LEAD PLASTIC SO (WIDE) TJMAX = 85°C, θJA = 100°C/W, θJC = 60°C (CJ) TJMAX = 85°C, θJA = 100°C/W, θJC = 60°C (CN) TJMAX = 150°C, θJA = 100°C/W, θJC = 60°C (MJ) TJMAX = 85°C, θJA = 80°C/W ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. Supply voltage = ±5V to ±15V PARAMETER CONDITIONS Supply Current Power Supply Leakage Current VON/OFF ≥ 2.4V, IOUT = 0, All Outputs Low VON/OFF ≤ 0.4V VON/OFF ≤ 0.1V, TA = 125°C Load = 2mA Positive Negative VSUPPLY = ±5V to ±15V VSUPPLY = 0V, VOUT = ±30V VSUPPLY = ±15V, VOUT = ±20V ● Operating or Shutdown Operating of Shutdown Low Input (VOUT = High) High Input (VOUT = Low) VIN > 2.0V VIN < 0.8V 0 ≤ VIN ≤ 5V IRESPONSE = 0, RL = 3k IRESPONSE = 50µA IRESPONSE = – 50µA VSUPPLY = ±6V, VON/OFF ≤ 0.4V VRESPONSE = ±6V ● Output Voltage Swing Output Current (Active) Output Current (Shutdown) Output Overload Voltage (Forced) Input Overload Voltage (Forced) Logic Input Levels Logic Input Current ON/OFF Pin Current Slew Rate Change in Slew Rate (Note 3) Response Pin Leakage Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: 3V applied to the strobe pin will force all outputs low. Strobe pin input impedance is about 2k to ground. Leave open when not used. 2 MIN ● V + – 0.3V 10 ● V + – 30V V– ● ● 2 ● –10 4 TYP MAX UNITS 500 1 10 V + – 0.1V V – + 0.7V 22 2 2 1000 10 50 µA µA µA V V mA µA µA 1.4 1.4 2 10 3 15 50 – 50 1 V – + 0.9V 100 100 V – + 30V 30V 0.8 20 20 50 30 V V V V µA µA µA V/µs % % µA Note 3: Response can be changed by connecting a resistor to the supply. For supplies less than ±6V this current is disconnected when shut down. Leave open when not used. LT1032 U W TYPICAL PERFOR A CE CHARACTERISTICS On Supply Current vs Temperature Supply Current vs Supply Voltage 2.0 3.0 1000 1.8 2.5 VS = ±12V ALL OUTPUTS HIGH ALL OUTPUTS HIGH 2.0 1.5 1.0 1.4 1.2 1.0 0.8 0.6 100 10 ALL OUTPUTS LOW 0.4 ALL OUTPUTS LOW 0.5 SUPPLY CURRENT (nA) 1.6 SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) Off Supply Current vs Temperature 0.2 1 0 0 –50 –25 50 25 75 0 TEMPERATURE (˚C) 100 5 125 12.5 10 7.5 SUPPLY VOLTAGE (±V) 1000 10µA 0.8 0.6 1µA VOUT = –30V 100nA VOUT = 30V 10nA 0.4 100 V = 5V 10 V = –5V 0.2 1 1nA 0 2 6 8 4 OUTPUT CURRENT (mA) 50 25 10 75 100 TEMPERATURE (°C) Current Limit vs Temperature 80 1.8 ON/OFF PIN VOLTAGE (V) 8 2 0 –2 70 1.6 MIN ON VOLTAGE 1.4 1.2 1.0 0.8 0.6 MAX OFF VOLTAGE 0.4 –4 1 3 2 INPUT VOLTAGE (V) 4 5 LT1032 • TPC07 0 –50 –25 60 50 SINKING 40 30 SOURCING 20 10 0.2 0 100 LT1032 • G06 2.0 10 4 75 TEMPERATURE (°C) Shutdown Pin Voltage vs Temperature 6 50 LT1032 • TPC05 ON/OFF Pin Current vs Voltage –6 25 125 OUTPUT CURRENT (mA) V– LT1032 • TA02 CURRENT (µA) LT1032 • TPC03 RESPONSE PIN LEAKAGE (µA) VOUT HIGH 0.4 125 Response Pin Leakage vs Temperature (Device Off) 100µA OUTPUT CURRENT OUTPUT VOLTAGE REFERRED TO SUPPLIES (V) V+ VOUT LOW 100 TEMPERATURE (°C) Output Leakage vs Temperature Output Swing vs Output Current 1.0 75 50 LT1032 • TPC02 LT1032 • TPC01 0.2 25 15 0 25 50 75 100 125 150 TEMPERATURE (°C) LT1032 • TPC08 0 – 55 – 25 0 25 50 75 100 125 150 TEMPERATURE (°C) LT1032 • TPC09 3 LT1032 U W TYPICAL PERFOR A CE CHARACTERISTICS Slew Rate vs Temperature 20 200 IOUT = 2mA 18 400 IOUT = 10mA 16 SLEW RATE (V/µs) OUTPUT VOLTAGE REFERRED TO SUPPLIES (V) Output Swing vs Temperature V+ IOUT = –10mA 1 800 IOUT = –2mA 600 12 10 8 6 4 200 2 –50 –25 0 FALLING 14 400 V– RISING VS = ±12V RL = 3k CL = 51pF VSLEW = ±8V 0 –50 –25 25 50 75 100 125 150 TEMPERATURE (°C) 50 25 0 75 TEMPERATURE (°C) VOUT VOUT ON/OFF INPUT 0 – 2V – 4V – 6V 5V 0 ON/OFF Response Time RL = 3k VS = ±6V CL = 51pF VIN = 0V 2V 0 VIN = 5V 5V/DIV OUTPUT HIGH OUTPUT LOW INPUT 0 200µs 400µs 10V VOUT 0 – 5V – 10V ON/OFF INPUT 5V 0 1ms 600µs VIN = 0V 5V 0 VOUT RL = 3k VS = ±12V CL = 51pF VIN = 5V 0 200µs 400µs 600µs Output Waveform RL = 3k CL = 51pF 50V 0 – 5V VOUT 4V 2V 0 – 2V – 4V LOGIC INPUT 5V 0 10V VS = ±12V 0 VOUT – 10V 5V 0 0 2µs 4µs 8µs 6µs 10µs RL = 450Ω VS = ±5V CL = 51pF 0 4µs 8µs 12µs LT1032 • TPC14 6V LOGIC INPUT 5V 0 5V/DIV OUTPUT 0 STROBE INPUT 0 10µs 20µs 30µs 40µs 50µs LT1032 • TPC16 4 20µs Strobe Pin Response RL = 3.3k VS = ±6V CL = 0.01µF 4V 2V 0 – 2V – 4V – 6V 16µs LT1032 • TPC15 Output Waveform Driving Capacitive Load VOUT 1ms LT1032 • TPC13 Output Waveform LOGIC INPUT OUTPUT HIGH OUTPUT LOW LT1032 • TPC12 VOUT 125 LT1032 • TPC11 LT1032 • TPC10 ON/OFF Response Time 6V 4V 100 5V 0 VIN = 0V RL = 3k VS = ±12V CL = 51pF 0 2µs 4µs 6µs 8µs LT1032 • TPC17 LT1032 UO U U PI FU CTI S VEE (J, N & S: Pin 1): Minus Supply. Operates –2V to –15V. (J & N: Pins 2, 5, 9, 12/S: Pins 2, 5, 11, 14): Logic Input. Operates properly on TTL or CMOS levels. Output valid form (V – + 2V) ≤ VIN ≤ 15V. Connect to ground when not used. (J & N: Pins 3, 6, 8, 11/S: Pins 3, 6, 10, 13): Output. Line drive output. ON/OFF (J, N & S: Pin 4): Shuts down entire circuit. Cannot be left open. For “normally on” operation, connect to V +. U W U UO APPLICATI GND (J, N & S: Pin 7): Ground. Ground must be more positive than V –. Response Control (J & N: Pin 10/S: Pin 12): Allows limited change of slew rate. Leave open when not used. Strobe (J & N: Pin 13/ S: Pin 15): Forces all outputs low. Drive with 3V. VCC (J & N:Pin 14/S: Pin 15): Positive Supply. Operates 5V to 15V. S I FOR ATIO Application Hints The LT1032 is exceptionally easy to use when compared to older drivers. Operating supply voltage can be as low as ±3V or as high as ±15V. Input levels are referred to ground. The logic inputs are internally set at TTL levels. Outputs are valid for input voltages from 1V above V – to 25V. Driving the logic inputs to V – turns off the output stage. The ON/OFF control completely turns off all supply current of the LT1032. The levels required to drive the device on or off are set by internal emitter-based voltages. Since the current into the ON/OFF pin is so low, TTL or CMOS drivers have no problem controlling the device. The strobe pin is not fully logic compatible. The impedance of the strobe pin is about 2kΩ to ground. Driving the strobe pin positive forces the output stages low–even if the device is shut off. Under worst case conditions, 3V minimum at 2mA are needed driving the strobe pin to insure strobing. The response pin can be used to make some adjustment in slew rate. A resistor can be connected between the response pin and the power supplies to drive 50µA to 100µA into the pin. The response pin is a low impedance point operating at about 0.75V above ground. For supply voltage up to ±6V, current is turned off when the device is turned off. For higher supply voltages, a Zener should be connected in series with the resistor to limit the voltage applied to the response pin to 6V. Also, for temperatures above 100°C, using the response pin is not recommended. The leakage current into the response pin at high temperatures is excessive. Outputs are well protected against shorts or externally applied voltage. Tested limits are ±30V, but the device can withstand external voltages up to breakdown of the transistors (typically about 50V). The LT1032 is usually immune to ESD up to 2500V on the outputs with no damage. UO TYPICAL APPLICATI S Protecting Against More Than ±30V Output Overload V+ 100Ω TO 1000Ω INPUT 1/4 LT1032 TO LINE INPUT 1/4 LT1032 TO LINE 30V ZENERS V– LT1032 • TA03b LT1032 • TA03a 5 LT1032 UO TYPICAL APPLICATI S FET Driver Slew Rate Adjustment* 15V 10V † 5V 15V 50k INPUT 80k 1/4 LT1032 LT1032 –15V PIN 10 80k OR 50µA INCREASES SLEW RATE 50µA DECREASES SLEW RATE OR LT1032 • TA04 120k 120k –15V –5V TTL/CMOS Compatible Strobe 10V † LT1032 • TA05 *ABOUT 4V/ms CHANGE ZENERS PREVENT LEAKAGE DURING SHUTDOWN † 5V Strobing with CMOS TO LT1032 STROBE TTL INPUT 10k ANY CMOS GATE TTL INPUT LT1032 • TA06 TO PIN 13 OF LT1032 LT1032 • TA07 Phase Shift Oscillator R 2 1/4 LT1032CSW 3 R C 5 1/4 LT1032CSW 6 R 9 C 1/4 LT1032CSW 8 R f= 1 3.3RC C LT1032 • TA09 Operating from a Single 5V Supply 5V 1 VEE 40k* CMOS INPUT 15k* 12 7 11 OUTPUT 0.7V TO 4.8V GND 1N4148 1N4148 6 14 VCC 1/4 LT1032CN 4 ON/OFF LT1032 • TA10 *LEVEL SHIFTING RESISTORS NEEDED FOR EACH INPUT LT1032 W W SI PLIFIED SCHE ATIC LOGIC INPUT V+ OUTPUT R10 2k R9 2k Q13 1 OF 4 DRIVERS R13 2k Q19 Q37 Q9 Q25 Q32 R12 30k Q8 R14 2k Q14 Q24 Q26 R1 50k Q29 Q7 Q18 R4 2k Q33 C2 3pF Q23 Q20 Q1 Q36 Q2 D3 Q17 ON/OFF Q3 Q6 Q12 R5 600Ω Q27 Q11 Q5 Q15 Q16 D2 Q39 Q28 Q30 Q22 Q40 R18 5k Q10 D1 Q4 R6 7.2k D4 R7 21.5k R8 1k R11 120Ω Q34 Q21 GND R17 7.5k C1 10pF Q31 R16 3Ω 2k V– LT1032 • SS RESPONSE TIME ADJ U PACKAGE DESCRIPTIO STROBE Dimensions in inches (millimeters) unless otherwise noted. J Package 14-Lead CERDIP (Narrow 0.300, Hermetic) (LTC DWG # 05-08-1110) 0.005 (0.127) MIN 0.200 (5.080) MAX 0.300 BSC (0.762 BSC) 0.015 – 0.060 (0.381 – 1.524) 0.008 – 0.018 (0.203 – 0.457) 0.785 (19.939) MAX 14 13 11 12 10 9 8 0.220 – 0.310 (5.588 – 7.874) 0.025 (0.635) RAD TYP 0° – 15° 1 0.045 – 0.065 (1.143 – 1.651) 0.100 (2.54) BSC 0.014 – 0.026 (0.360 – 0.660) 2 3 4 5 6 J14 1298 7 0.125 (3.175) MIN NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS N Package 14-Lead PDIP (Narrow 0.300) (LTC DWG # 05-08-1510) 0.130 ± 0.005 (3.302 ± 0.127) 0.300 – 0.325 (7.620 – 8.255) 0.045 – 0.065 (1.143 – 1.651) 0.020 (0.508) MIN 0.065 (1.651) TYP 0.009 – 0.015 (0.229 – 0.381) +0.035 0.325 –0.015 ( +0.889 8.255 –0.381 ) 0.770* (19.558) MAX 0.125 (3.175) MIN 0.005 (0.125) MIN 0.100 (2.54) BSC 0.018 ± 0.003 (0.457 ± 0.076) 14 13 12 11 10 9 8 1 2 3 4 5 6 7 0.255 ± 0.015* (6.477 ± 0.381) N14 1098 *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm) 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. 7 LT1032 U TYPICAL APPLICATION ±5V to ±15V Voltage Multiplier 5V 14 LT1032 2 3 5 6 1N4148 470µF 1N4148 VOUT 13.7V AT NO LOAD 12V AT 10mA + + 470µF fCLK = 1kHz 470µF 8 9 5V 0V 1N4148 –VOUT –13.7V AT NO LOAD 470µF –12V AT 10mA + + 11 12 1N4148 1 –5V U PACKAGE DESCRIPTIO LT1032 • TA08 Dimensions in inches (millimeters) unless otherwise noted. SW Package 16-Lead Plastic Small Outline (Wide 0.300) (LTC DWG # 05-08-1620) 0.291 – 0.299** (7.391 – 7.595) 0.010 – 0.029 × 45° (0.254 – 0.737) 0.398 – 0.413* (10.109 – 10.490) 0.093 – 0.104 (2.362 – 2.642) 0.037 – 0.045 (0.940 – 1.143) 16 15 14 13 12 11 10 9 0° – 8° TYP 0.009 – 0.013 (0.229 – 0.330) NOTE 1 0.016 – 0.050 (0.406 – 1.270) 0.050 (1.270) BSC 0.004 – 0.012 (0.102 – 0.305) 0.394 – 0.419 (10.007 – 10.643) NOTE 1 0.014 – 0.019 (0.356 – 0.482) TYP 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 1 2 3 4 5 6 7 8 S16 (WIDE) 1098 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1039A Triple RS232 Driver/Receiver with Shutdown ±15kV ESD Protection LT1130A/LT1140A 5V Supply, Multiple RS232 Driver/Receiver ±15kV 3 Driver/5 Receiver (LT1137A) LT1780/LT1781A 5V Supply, 2 Driver/2 Receiver RS232 ±15kV Pin Compatible Upgrade to LT1080/LT1081 and LT1180A/LT1181A 8 Linear Technology Corporation 1032fd LT/TP 0999 2K REV D • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408)432-1900 ● FAX: (408) 434-0507 ● www.linear-tech.com LINEAR TECHNOLOGY CORPORATION 1994