LM57 datasheet(4/39 Pages) TI2

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VDD

GND

VDD

GND

1 2A

VDD

GND

VDD

GND

LM57

VDD

GND

TRIP TEST

VTEMP

TOVER

SENSE1

SENSE2

LM57-Q1

SNIS191A – JULY 2015 – REVISED JULY 2015

www.ti.com

5 Pin Configuration and Functions

TSSOP/PW Package

8-Pin

Top View

Pin Functions

TYPE

EQUIVALENT CIRCUIT

DESCRIPTION

NAME

NO.

GND

Ground

—

Power supply ground

Trip-point resistor sense. One of two sense pins which selects the

SENSE1

—

temperature at which TOVER and TOVER will assert.

Trip-point resistor sense. One of two sense pins which selects the

SENSE2

—

temperature at which TOVER and TOVER will assert.

VDD

Power

Supply voltage

TRIP TEST pin. Active High input.

If TRIP TEST = 0 (default), then the VTEMP output has the analog

TRIP

Digital

temperature sensor output voltage.

TEST

Input

If TRIP TEST = 1, then TOVER and TOVER outputs are asserted and VTEMP =

VTRIP, the temperature trip voltage.

Tie this pin to ground if not used.

Overtemperature switch output

Active low, open-drain (see LM57-Q1 VTEMP Voltage-to-Temperature

Digital

Equations regarding required pullup resistor.)

TOVER

Output

Asserted when the measured temperature exceeds the Trip Point

Temperature or if TRIP TEST = 1

This pin may be left open if not used.

Overtemperature switch output

Active high, push-pull

Digital

TOVER

Asserted when the measured temperature exceeds the trip point

Output

temperature or if TRIP TEST = 1

This pin may be left open if not used.

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