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LM56
  • LM56
  • LM56
  • LM56
  • LM56
  • LM56

LM56

ACTIVE

3°C Dual output resistor-programmable temperature switch with fan control

Texas Instruments LM56 Product Info

1 April 2026 2

Parameters

Setpoint type

Resistor Programmable

Setpoint value (°C)

-40 to 125

Operating temperature range (°C)

-40 to 125

Accuracy over temp range (max) (°C)

3

Sensor gain (mV/°C)

6.2

Output type

Open drain

Supply voltage (min) (V)

2.7

Supply voltage (max) (V)

10

Supply current (typ) (µA)

230

Number of comparator channels

2

Features

Built-in hysteresis, UL recognized

Rating

Catalog

Interface type

Analog output, Switch

Package

SOIC (D)-8-29.4 mm² 4.9 x 6

Features

  • Digital Outputs Support TTL Logic Levels
  • Internal Temperature Sensor
  • 2 Internal Comparators with Hysteresis
  • Internal Voltage Reference
  • Available in 8-pin SOIC and VSSOP Packages
  • Digital Outputs Support TTL Logic Levels
  • Internal Temperature Sensor
  • 2 Internal Comparators with Hysteresis
  • Internal Voltage Reference
  • Available in 8-pin SOIC and VSSOP Packages

Description

The LM56 is a precision low power thermostat. Two stable temperature trip points (VT1 and VT2) are generated by dividing down the LM56 1.250V bandgap voltage reference using 3 external resistors. The LM56 has two digital outputs. OUT1 goes LOW when the temperature exceeds T1 and goes HIGH when the the temperature goes below (T1–THYST). Similarly, OUT2 goes LOW when the temperature exceeds T2 and goes HIGH when the temperature goes below (T2–THYST). THYST is an internally set 5°C typical hysteresis.

The LM56 is available in an 8-lead VSSOP surface mount package and an 8-lead SOIC.

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