LM56 datasheet(7/21 Pages) TI

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LM56

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SNIS120G – APRIL 2000 – REVISED FEBRUARY 2013

FUNCTIONAL DESCRIPTION

Pin Functions

V+

This is the positive supply voltage pin. This pin should be bypassed with a 0.1 µF capacitor to ground.

GND

This is the ground pin.

VREF

This is the 1.250V bandgap voltage reference output pin. In order to maintain trip point accuracy this pin

should source a 50 µA load.

VTEMP

This is the temperature sensor output pin.

OUT1

This is an open collector digital output. OUT1 is active LOW. It goes LOW when the temperature is greater

than T1 and goes HIGH when the temperature drops below T1– 5°C. This output is not intended to directly

drive a fan motor.

OUT2

This is an open collector digital output. OUT2 is active LOW. It goes LOW when the temperature is greater

than the T2 set point and goes HIGH when the temperature is less than T2– 5°C. This output is not intended to

directly drive a fan motor.

VT1

This is the input pin for the temperature trip point voltage for OUT1.

VT2

This is the input pin for the low temperature trip point voltage for OUT2.

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