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1 Features

1? No External Components Required

? Shutdown Mode to Minimize Power Consumption

? Up to Eight LM75s Can be Connected to a Single

Bus

? Power Up Defaults Permit Stand-alone Operation

as Thermostat

? UL Recognized Component (LM75B and LM75C)

? Key Specifications:

– Supply Voltage

– LM75B, LM75C: 3 V to 5.5 V

– Supply Current

– Operating: 280 μA (typical)

– Shutdown: 4 μA (typical)

– Temperature Accuracy

– ?25°C to 100°C: ±2°C (maximum)

– ?55°C to 125°C: ±3°C (maximum)

2 Applications

? General System Thermal Management

? Communications Infrastructure

? Electronic Test Equipment

? Environmental Monitoring

3 Description

The LM75B and LM75C are industry-standard digital

temperature sensors with an integrated Sigma-Delta analog-to-digital converter and I2C interface. The

LM75 provides 9-bit digital temperature readings with

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

over –55°C to 125°C.

Communication is accomplished over a 2-wire

interface which operates up to 400kHz. The LM75

has three address pins, allowing up to eight LM75

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

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

with programmable limit and hystersis. This output

has programmable fault tolerance, which allows the

user to define the number of consecutive error

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

The wide temperature and supply range and I2C

interface make the LM75 ideal for a number of

applications including base stations, electronic test

equipment, office electronics, personal computers,

and any other system where thermal management is

critical to performance. The LM75B and LM75C are available in an SOIC package or VSSOP package.