LT1032

LT1032 Quad Low Power Line Driver FEATURES s s s s s s s s 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 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. APPLICATIO S s s s s RS232 Power Supply Inverter Micropower Interface Level Translator TYPICAL APPLICATIO 1 2 LT1032 RS232 Line Driver –6V INPUT 14 13 12 11 6V STROBE* INPUT Output Swing vs Output Current OUTPUT VOLTAGE REFERRED TO SUPPLIES (V) V+ 0.2 0.4 VOUT HIGH 3 OUTPUT ON/OFF 4 (0V TO 5V)† 5 INPUT 6 OUTPUT 7 GND OUTPUT 10 RESPONSE TIME CONTROL* 9 INPUT 8 OUTPUT 1.0 0.8 0.6 0.4 0.2 V– 0 2 *NO CONNECTION NEEDED WHEN NOT USED † 5V = ON LT1032 • TA01 U VOUT LOW 6 8 4 OUTPUT CURRENT (mA) 10 LT1032 • TA02 U U 1032fe 1 LT1032 ABSOLUTE AXI U RATI GS (Note 1) 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 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 PACKAGE/ORDER I FOR ATIO TOP VIEW VEE (–15V TO –5V) 1 2 3 14 VCC (5V TO 15V) ORDER PART NUMBER TOP VIEW 13 STROBE 12 11 RESPONSE 10 CONTROL 9 8 N PACKAGE 14-LEAD PDIP ON/OFF (0V TO 5V) 4 5 6 LT1032CN LT1032IN GND 7 TJMAX = 150°C, θJA = 130°C/W CN) J PACKAGE 14-LEAD CERDIP TJMAX = 150°C, θJA = 95°C/W (CJ) TJMAX = 150°C, θJA = 95°C/W (MJ) LT1032CJ LT1032MJ OBSOLETE PACKAGE Consider the N Package as an Alternate Source Consult LTC Marketing for parts specified with wider operating temperature ranges. The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. Supply voltage = ± 5V to ±15V PARAMETER Supply Current Power Supply Leakage Current 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 CONDITIONS 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 q q ELECTRICAL CHARACTERISTICS 2 U U W WW U W ORDER PART NUMBER VEE 1 2 3 ON/OFF 4 5 6 GND 7 NC 8 16 VCC 15 STROBE 14 13 12 RESPONSE CONTROL 11 10 9 NC LT1032CSW LT1032ISW SW PACKAGE 16-LEAD PLASTIC SO (WIDE) TJMAX = 150°C, θJA = 90°C/W MIN TYP 500 1 10 V + – 0.1V V – + 0.7V 22 2 2 MAX 1000 10 50 V – + 0.9V 100 100 V – + 30V 30V 0.8 20 20 50 30 UNITS µA µA µA V V mA µA µA V V V V µA µA µA V/µs 1032fe V + – 0.3V 10 q q q q V + – 30V V– 2 1.4 1.4 2 10 3 15 q –10 4 LT1032 The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. Supply voltage = ± 5V to ±15V PARAMETER Change in Slew Rate (Note 3) Response Pin Leakage CONDITIONS IRESPONSE = 50µA IRESPONSE = – 50µA VSUPPLY = ± 6V, VON/OFF ≤ 0.4V VRESPONSE = ± 6V MIN TYP 50 – 50 1 MAX UNITS % % µA ELECTRICAL CHARACTERISTICS 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. 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. TYPICAL PERFOR A CE CHARACTERISTICS On Supply Current vs Temperature 3.0 2.5 SUPPLY CURRENT (mA) 2.0 1.5 1.0 0.5 0 –50 –25 ALL OUTPUTS HIGH SUPPLY CURRENT (mA) 1.4 1.2 1.0 0.8 0.6 0.4 0.2 ALL OUTPUTS LOW SUPPLY CURRENT (nA) ALL OUTPUTS LOW 50 25 75 0 TEMPERATURE (˚C) Output Swing vs Output Current OUTPUT VOLTAGE REFERRED TO SUPPLIES (V) V+ 0.2 0.4 VOUT HIGH RESPONSE PIN LEAKAGE (µA) OUTPUT CURRENT 1.0 0.8 0.6 0.4 0.2 V– VOUT LOW 0 2 6 8 4 OUTPUT CURRENT (mA) UW 100 LT1032 • TPC01 LT1032 • TA02 Supply Current vs Supply Voltage 2.0 1.8 1.6 ALL OUTPUTS HIGH Off Supply Current vs Temperature 1000 VS = ±12V 100 10 125 0 5 12.5 10 7.5 SUPPLY VOLTAGE (± V) 15 LT1032 • TPC02 1 25 50 75 100 125 TEMPERATURE (°C) LT1032 • TPC03 Output Leakage vs Temperature 100µA 1000 Response Pin Leakage vs Temperature (Device Off) 10µA 100 1µA VOUT = – 30V 100nA 10 V = 5V V = –5V 10nA VOUT = 30V 1nA 10 1 25 50 75 100 TEMPERATURE (°C) 125 LT1032 • TPC05 25 50 75 100 LT1032 • G06 TEMPERATURE (°C) 1032fe 3 LT1032 TYPICAL PERFOR A CE CHARACTERISTICS ON/OFF Pin Current vs Voltage 10 8 ON/OFF PIN VOLTAGE (V) 6 OUTPUT CURRENT (mA) CURRENT (µA) 4 2 0 –2 –4 –6 0 1 3 2 INPUT VOLTAGE (V) 4 5 Output Swing vs Temperature OUTPUT VOLTAGE REFERRED TO SUPPLIES (V) V+ 200 400 IOUT = 2mA IOUT = 10mA SLEW RATE (V/µs) 1 800 600 400 200 V– –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) LT1032 • TPC10 ON/OFF Response Time 6V 4V 2V 0 RL = 3k VS = ± 6V OUTPUT CL = 51pF HIGH 5V/DIV 10V VOUT 5V 0 0 – 5V – 10V 5V 0 VOUT VIN = 0V 0 – 2V VOUT – 4V – 6V 5V ON/OFF INPUT 0 VIN = 5V 0 200µs 400µs 4 UW LT1032 • TPC07 Shutdown Pin Voltage vs Temperature 2.0 1.8 1.6 MIN ON VOLTAGE 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) LT1032 • TPC08 Current Limit vs Temperature 80 70 60 50 SINKING 40 30 20 10 0 – 55 – 25 0 25 50 75 100 125 150 TEMPERATURE (°C) LT1032 • TPC09 MAX OFF VOLTAGE SOURCING Slew Rate vs Temperature 20 18 16 14 12 10 8 6 4 2 VS = ±12V RL = 3k CL = 51pF VSLEW = ± 8V 50 25 0 75 TEMPERATURE (°C) 100 125 FALLING RISING IOUT = – 10mA IOUT = –2mA 0 –50 –25 LT1032 • TPC11 ON/OFF Response Time RL = 3k VS = ± 12V CL = 51pF OUTPUT HIGH VIN = 0V OUTPUT LOW VOUT VIN = 5V OUTPUT LOW INPUT 600µs 1ms LT1032 • TPC12 ON/OFF INPUT 0 200µs 400µs 600µs 1ms LT1032 • TPC13 1032fe LT1032 TYPICAL PERFOR A CE CHARACTERISTICS Output Waveform 50V VOUT 0 – 5V RL = 3k CL = 51pF 4V 2V 0 – 2V – 4V 10V VS = ± 12V 0 VOUT – 10V LOGIC INPUT 5V 0 0 LOGIC INPUT 2µs 4µs 6µs 8µs 10µs LT1032 • TPC14 Output Waveform Driving Capacitive Load 6V 4V 2V 0 – 2V – 4V – 6V RL = 3.3k VS = ± 6V CL = 0.01µF OUTPUT 0 5V/DIV VOUT LOGIC INPUT 5V 0 0 10µs PI FU CTI S 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. 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 +. UW 20µs Output Waveform RL = 450Ω VS = ±5V CL = 51pF VOUT 5V 0 0 4µs 8µs 12µs 16µs 20µs LT1032 • TPC15 Strobe Pin Response VIN = 0V 30µs 40µs 50µs STROBE INPUT 5V 0 RL = 3k VS = ± 12V CL = 51pF 0 2µs 4µs 6µs 8µs LT1032 • TPC17 LT1032 • TPC16 UO U U 1032fe 5 LT1032 APPLICATI 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. TYPICAL APPLICATI S Protecting Against More Than ± 30V Output Overload V+ 100Ω TO 1000Ω INPUT 1/4 LT1032 TO LINE V– LT1032 • TA03a FET Driver 15V 50k INPUT 1/4 LT1032 –15V LT1032 • TA04 6 U 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. INPUT 1/4 LT1032 TO LINE 30V ZENERS LT1032 • TA03b W UO U UO Slew Rate Adjustment* 10V † 5V 80k 80k 15V 50µA INCREASES SLEW RATE LT1032 PIN 10 OR OR 50µA –15V † LT1032 • TA05 120k –5V 120k DECREASES SLEW RATE † 10V *ABOUT 4V/ms CHANGE ZENERS PREVENT LEAKAGE DURING SHUTDOWN 1032fe LT1032 TYPICAL APPLICATI UO 3 S TTL/CMOS Compatible Strobe 5V Strobing with CMOS TTL INPUT 10k TO LT1032 STROBE TTL INPUT ANY CMOS GATE TO PIN 13 OF LT1032 LT1032 • TA07 LT1032 • TA06 Phase Shift Oscillator R 2 C 1/4 LT1032CSW R C 5 1/4 LT1032CSW 6 R C 9 1/4 LT1032CSW 8 R f= 1 3.3RC LT1032 • TA09 Operating from a Single 5V Supply 5V 1 40k* CMOS INPUT 15k* 12 VEE 14 VCC 1/4 LT1032CN 4 ON/OFF 11 OUTPUT 0.7V TO 4.8V 7 GND LT1032 • TA10 1N4148 1N4148 *LEVEL SHIFTING RESISTORS NEEDED FOR EACH INPUT 1032fe 7 LT1032 SI PLIFIED SCHE ATIC LOGIC INPUT V+ R9 2k R10 2k Q9 Q25 R12 30k Q8 R1 50k Q7 R4 2k Q1 Q2 Q17 ON/OFF Q3 Q6 Q12 Q11 Q5 Q4 GND Q10 D1 R6 7.2k R7 21.5k R8 1k R11 120Ω Q21 Q31 2k V – LT1032 • SS R5 600Ω 8 W W OUTPUT Q13 Q19 R13 2k 1 OF 4 DRIVERS Q37 Q32 R14 2k Q24 Q26 Q29 Q18 Q20 D3 Q23 Q33 C2 3pF Q36 D4 Q14 Q27 Q15 Q16 D2 Q22 Q28 Q30 Q39 Q40 R18 5k Q34 R17 7.5k C1 10pF R16 3Ω RESPONSE TIME ADJ STROBE 1032fe LT1032 PACKAGE DESCRIPTIO U J Package 14-Lead CERDIP (Narrow .300 Inch, Hermetic) (Reference LTC DWG # 05-08-1110) 0.005 (0.127) MIN 0.785 (19.939) MAX 14 13 12 11 10 9 8 0.025 (0.635) RAD TYP 0.220 – 0.310 (5.588 – 7.874) 1 2 3 4 5 6 7 0.200 (5.080) MAX 0.015 – 0.060 (0.381 – 1.524) 0.045 – 0.065 (1.143 – 1.651) NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS 0.014 – 0.026 (0.360 – 0.660) 0.100 (2.54) BSC 0.125 (3.175) MIN J14 1298 0.300 BSC (0.762 BSC) 0.008 – 0.018 (0.203 – 0.457) 0° – 15° OBSOLETE PACKAGE 1032fe 9 LT1032 PACKAGE DESCRIPTIO U N Package 14-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) 0.770* (19.558) MAX 14 13 12 11 10 9 8 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) 0.020 (0.508) MIN 0.009 – 0.015 (0.229 – 0.381) 0.005 (0.125) MIN 0.100 (2.54) *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. BSC MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm) +0.035 0.325 –0.015 +0.889 8.255 –0.381 2 3 4 5 6 7 0.045 – 0.065 (1.143 – 1.651) 0.065 (1.651) TYP 0.125 (3.175) MIN 0.018 ± 0.003 (0.457 ± 0.076) N14 1098 ( ) 1032fe 10 LT1032 PACKAGE DESCRIPTIO 0.291 – 0.299** (7.391 – 7.595) 0.010 – 0.029 × 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 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. U SW Package 16-Lead Plastic Small Outline (Wide .300 Inch) (Reference 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 2 3 4 5 6 7 8 0.093 – 0.104 (2.362 – 2.642) 0.037 – 0.045 (0.940 – 1.143) 0.050 (1.270) BSC 0.004 – 0.012 (0.102 – 0.305) 0.014 – 0.019 (0.356 – 0.482) TYP S16 (WIDE) 1098 1032fe 11 LT1032 TYPICAL APPLICATION ± 5V to ± 15V Voltage Multiplier 5V 14 LT1032 2 3 1N4148 5 6 fCLK = 1kHz 5V 0V 9 8 470µF + 12 11 1N4148 1 –5V LT1032 • TA08 RELATED PARTS PART NUMBER LT1039A LT1130A/LT1140A LT1780/LT1781A DESCRIPTION Triple RS232 Driver/Receiver with Shutdown 5V Supply, Multiple RS232 Driver/Receiver 5V Supply, 2 Driver/2 Receiver RS232 COMMENTS ±15kV ESD Protection ± 15kV 3 Driver/5 Receiver (LT1133A, LT1137A, LT1141A) ±15kV Pin Compatible Upgrade to LT1080/LT1081 and LT1180A/LT1181A 12 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 q FAX: (408) 434-0507 q www.linear.com + + U 470µF 1N4148 + 1N4148 470µF VOUT 13.7V AT NO LOAD 12V AT 10mA –VOUT –13.7V AT NO LOAD 470µF –12V AT 10mA 1032fe LT/TP 0302 1.5K REV E • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 1994