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LT1032 Quad Low Power Line Driver
FEATURES
s s s s s s s s
DESCRIPTIO
Low Operating Voltage: 5V to 15V 500A 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(R)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
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LT1032 ABSOLUTE AXI U RATI GS (Note 1)
Operating Temperature Range LT1032C ............................................... 0C to 70C LT1032I ........................................... - 40C to 85C LT1032M ....................................... - 55C to 125C C Grade Guaranteed Functional by Design .............................. - 25C to 85C Lead Temperature (Soldering, 10 sec)................. 300C 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 ................ - 65C to 150C
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 = 150C, JA = 130C/W CN) J PACKAGE 14-LEAD CERDIP TJMAX = 150C, JA = 95C/W (CJ) TJMAX = 150C, JA = 95C/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 = 25C. 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 = 125C 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 = 150C, JA = 90C/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 A A A V V mA A A V V V V A A A V/s
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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 = 25C. Supply voltage = 5V to 15V
PARAMETER Change in Slew Rate (Note 3) Response Pin Leakage CONDITIONS IRESPONSE = 50A IRESPONSE = - 50A VSUPPLY = 6V, VON/OFF 0.4V VRESPONSE = 6V MIN TYP 50 - 50 1 MAX UNITS % % A
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
10A OUTPUT CURRENT
RESPONSE PIN LEAKAGE (A)
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
100A 1000
Response Pin Leakage vs Temperature (Device Off)
100
1A 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)
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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 (A)
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/s)
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
200s
400s
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 600s 1ms
LT1032 * TPC12
ON/OFF INPUT
0
200s
400s
600s
1ms
LT1032 * TPC13
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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 2s 4s 6s 8s 10s
LT1032 * TPC14
Output Waveform Driving Capacitive Load
6V 4V 2V 0 - 2V - 4V - 6V RL = 3.3k VS = 6V CL = 0.01F OUTPUT 0 5V/DIV
VOUT
LOGIC INPUT
5V 0
0
10s
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
20s
Output Waveform
RL = 450 VS = 5V CL = 51pF
VOUT
LOGIC INPUT
5V 0 0 4s 8s 12s 16s 20s
LT1032 * TPC15
Strobe Pin Response
VIN = 0V
STROBE INPUT 30s 40s 50s
LT1032 * TPC16
5V 0
RL = 3k VS = 12V CL = 51pF 0 2s 4s 6s 8s
LT1032 * TPC17
UO
U
U
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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 2k 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+ 100 TO 1000 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 50A to 100A 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 100C, 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 50A INCREASES SLEW RATE
LT1032
PIN 10
OR
OR DECREASES SLEW RATE
120k -5V
120k
50A -15V
10V *ABOUT 4V/ms CHANGE ZENERS PREVENT LEAKAGE DURING SHUTDOWN
LT1032 * TA05
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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
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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 120 Q21 Q31 2k V
-
LT1032 * SS
R5 600
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 3
RESPONSE TIME ADJ
STROBE
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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
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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
(
)
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LT1032
PACKAGE DESCRIPTIO
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
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
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LT1032
TYPICAL APPLICATION
5V to 15V Voltage Multiplier
5V 14 LT1032 2 3 1N4148
5
6
fCLK = 1kHz 5V 0V 9 8
470F
+
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
470F
1N4148
+
470F 1N4148
VOUT 13.7V AT NO LOAD 12V AT 10mA
-VOUT -13.7V AT NO LOAD 470F -12V AT 10mA
1032fe LT/TP 0302 1.5K REV E * PRINTED IN USA
(c) LINEAR TECHNOLOGY CORPORATION 1994

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