LM56_15 Datasheet, PDF (7/22 Pages) Texas Instruments – LM56 Dual Output Low Power Thermostat

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LM56
SNIS120G – APRIL 2000 – REVISED FEBRUARY 2013
FUNCTIONAL DESCRIPTION
V⁺
GND
V_REF
V_TEMP
OUT1
OUT2
V_T1
V_T2
Pin Functions
This is the positive supply voltage pin. This pin should be bypassed with a 0.1 µF capacitor to ground.
This is the ground pin.
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.
This is the temperature sensor output pin.
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.
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.
This is the input pin for the temperature trip point voltage for OUT1.
This is the input pin for the low temperature trip point voltage for OUT2.
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