1 Features

• Internal Comparator with Pin Programmable 2°C

or 10°C Hysteresis

• No External Components Required

• Open Drain or Push-Pull Digital Output; Supports

CMOS Logic Levels

• Internal Temperature Sensor

• Internal Voltage Reference and DAC for Trip-Point

Setting

• Currently Available in 5-Pin SOT-23 Plastic

Package

• Excellent Power Supply Noise Rejection

• Key Specifications:

– Power Supply Voltage: 2.7V to 5.5 V

– Power Supply Current:

• 40μA(max)

• 20μA(typ)

– Hysteresis Temperature: 2°C or 10°C(typ)

2 Applications

• Microprocessor Thermal Management

• Appliances

• Portable Battery Powered Systems

• Fan Control

• Industrial Process Control

• HVAC Systems

• Remote Temperature Sensing

• Electronic System Protection

3 Description

The LM26NV is a precision, single digital-output, lowpower

thermostat comprised of an internal reference,

DAC, temperature sensor and comparator. Utilizing

factory programming, it can be manufactured with

different trip points as well as different digital output

functionality. The trip point (TOS) can be preset at

the factory to any temperature in the range of −55°C

to +110°C in 1°C increments. The LM26NV has one

digital output (OS/ OS/US/ US) and one digital input

(HYST). The digital output stage can be preset as

either open-drain or push-pull. In addition, it can be

factory programmed to be active HIGH or LOW. The

digital output can be factory programmed to indicate

an over temperature shutdown event (OS or OS) or

an under temperature shutdown event (US or US).

When preset as an overtemperature shutdown ( OS),

it will go LOW to indicate that the die temperature is

over the internally preset TOS and go HIGH when the

temperature goes below (TOS–THYST). Similarly, when

preprogrammed as an undertemperature shutdown

(US) it will go HIGH to indicate that the temperature

is below TUS and go LOW when the temperature is

above (TUS+THYST). The typical hysteresis, THYST, can

be set to 2°C or 10°C and is controlled by the state of

the HYST pin.

Available parts are detailed in the ordering

information. For other part options, contact a Texas

Instruments Distributor or Sales Representative for

information on minimum order qualification. The

LM26NV is currently available in a 5-lead SOT-23

package.