LT1032
Quad Low Power
Line Driver
U
FEATURES
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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
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APPLICATIO S
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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.
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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
1032fe
1
