5

LT1032

PI

FU C

S

TI

(J & N: Pins 2, 5, 9, 12/S: Pins 2, 5, 11, 14): Logic

Input. Operates properly on TTL or CMOS levels. Output

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

GND (J, N & S: Pin 7): Ground. Ground must be more

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.

to 15V.

TO LINE

1/4 LT1032

LT1032 • TA03b

30V ZENERS

INPUT

100

Ω TO

1000

Ω

TO LINE

1/4 LT1032

LT1032 • TA03a

INPUT

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 50

µA 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 con-

nected 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 tran-

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

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

S

APPLICATI

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

±3Vorashighas±15V.Inputlevelsarereferredtoground.

The logic inputs are internally set at TTL levels. Outputs are

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

Ωtoground.Drivingthestrobe

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.

S

APPLICATI

TYPICAL

Protecting Against More Than

±30V Output Overload