LM75B, LM75C

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SNIS153B – JULY 2009 – REVISED MARCH 2013

LM75B

LM75C Digital Temperature Sensor and Thermal Watchdog with Two-Wire Interface

Check for Samples: LM75B, LM75C

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FEATURES

DESCRIPTION

The LM75B and LM75C are industy-standard digital

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•

No External Components Required

temperature sensors with an integrated Sigma-Delta

•

Shutdown Mode to Minimize Power

Consumption

LM75 provides 9-bit digital temperature readings with

•

Up to Eight LM75s Can be Connected to a

an accuracy of ±2°C from -25°C to 100°C and ±3°C

over -55°C to 125°C.

Single Bus

•

Power Up Defaults Permit Stand-alone

Communication

is

accomplished

over

a

2-wire

Operation as Thermostat

interface which operates up to 400kHz. The LM75

has three address pins, allowing up to eight LM75

•

UL Recognized Component (LM75B and

devices to operate on the same 2-wire bus. The

LM75C)

LM75 has a dedicated over-temperature output (O.S.)

with programmable limit and hystersis. This output

APPLICATIONS

has programmable fault tolerance, which allows the

•

General System Thermal Management

user to define the number of consecutive error

conditions that must occur before O.S. is activated.

•

Communications Infrastructure

•

Electronic Test Equipment

interface make the LM75 ideal for a number of

•

Environmental Monitoring

applications including base stations, electronic test

equipment, office electronics, personal computers,

KEY SPECIFICATIONS

and any other system where thermal management is

•

Supply Voltage

critical to performance. The LM75B and LM75C are

available in an SOIC package or VSSOP package.

–

LM75B, LM75C: 3.0V to 5.5V

•

Supply Current

–

Operating: 280

μA (typ)

–

Shutdown: 4

μA (typ)

•

Temperature Accuracy

–

−25°C to 100°C: ±2°C (max)

–

−55°C to 125°C: ±3°C (max)

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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PRODUCTION DATA information is current as of publication date.

Copyright © 2009–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.