General Description

The LM75 temperature sensor includes a delta-sigma

analog-to-digital converter, and a digital overtemperature

interface to read temperature at any time. The open-drain

overtemperature output (OS) sinks current when the

programmable temperature limit is exceeded. The OS

output operates in either of two modes, comparator or

interrupt. The host controls the temperature at which the

host. The address of the LM75 is set with three pins to allow

multiple devices to work on the same bus. Power-up is in

= +75°C. The 3.0V to 5.5V supply voltage range, low supply

applications in thermal management and protection.

Applications

● Thermal System Management

● Thermal Protection

● Test Equipment

● Computers and Office Electronics

Features

● Separate Open-Drain OS Output Operates as

Interrupt or Comparator/Thermostat Input

● Register Readback Capability

● Power-Up Defaults Permit Stand-Alone Operation

as a Thermostat

● 3.0V to 5.5V Supply Voltage

● Low Operating Supply Current 250μA (typ), 1mA (max)

● 4μA (typ) Shutdown Mode Minimizes Power

Consumption

● Up to Eight LM75s Can Be Connected to a Single Bus

● Pin- and/or Register-Compatible with Improved-

Performance Maxim Sensors Including MAX7500,

MAX6625, MAX6626, DS75LV, and DS7505

μMAX is a registered trademark of Maxim Integrated Products, Inc.

+Denotes a lead(Pb)-free/RoHS-compliant package.

T&R = Tape and reel.

19-4385; Rev 2; 11/21

PART

PIN-PACKAGE

PKG

SUPPLY VOLTAGE (V)

TOP MARK

LM75BIM-3+

8 SO (SOP)

Bulk

3.3

LM75BAIM-3

LM75BIMX-3+

8 SO (SOP)

T&R

3.3

LM75BAIM-3

LM75BIMM-3+

8 µMAX (µSOP)

Bulk

3.3

T01B

LM75BIMMX-3+

8 µMAX (µSOP)

T&R

3.3

T01B

LM75BIM-5+

8 SO (SOP)

Bulk

5.0

LM75BIM-5

LM75BIMX-5+

8 SO (SOP)

T&R

5.0

LM75BIM-5

LM75BIMM-5+

8 µMAX (µSOP)

Bulk

5.0

T00B

LM75BIMMX-5+

8 µMAX (FSOP)

T&R

5.0

T00B

Digital Temperature Sensor and Thermal

Watchdog with 2-Wire Interface

LM75

Design

Resources

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and Models

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Functional Diagram

Pin Configuration

Ordering Information/Selector Guide

OS

SDA

SCL

A0

A1

A2

SILICON

BANDGAP

TEMPERATURE

SENSOR

9-BIT DELTA-

SIGMAADC

CONFIGURATION

REGISTER

TOS SET POINT

REGISTER

POINT REGISTER

SET POINT

COMPARATOR W/

HYSTERESIS

2-WIRE INTERFACE

POINTER

REGISTER

8

8

16

16

16

16

16

8

3

1

2

4

7

6

5

1

+

2

3

4

8

7

6

5

A0

A1

A2

GND

OS

SCL

SDA

LM75

µMAX (µSOP), SO

TOP VIEW