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LT1032CN
(Rev.:RevC)

Quad Low Power Line Driver

Linear Technology 

LT1032

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 +.

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.

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.

The response pin can be used to make some adjustment in

slew rate. A resistor can be connected between the re-

sponse 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 transis-

tors (typically about 50V). The LT1032 is usually immune to

ESD up to 2500V on the outputs with no damage.

TYPICAL APPLICATI S

Protecting Against More Than ±30V Output Overload

V+

INPUT

1/4 LT1032

100Ω TO

1000Ω

TO LINE

INPUT

1/4 LT1032

V–

LT1032 • TA03a

TO LINE

30V ZENERS

LT1032 • TA03b

5

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