Ultra-small, dual-channel (hot & cold trip), 0.5-µA, resistor-programmable temperature switch


Product details


SetPoint type Resistor Programmable SetPoint value (deg C) -50C to 124C Operating temperature range (C) -55 to 130 Accuracy over temp range (Max) (C) 1.5 Output type Open Drain Supply voltage (Min) (V) 1.62 Supply voltage (Max) (V) 5.5 Supply current (Typ) (uA) 0.5 Comparator channels (#) 2 Features Built-in hysteresis Rating Catalog Interface type Switch open-in-new Find other Temperature switches

Package | Pins | Size

SOT-5X3 (DRL) 6 2 mm² 1.65 x 1.2 open-in-new Find other Temperature switches


  • Resistor programmable temperature trip points and hysteresis options
    • Resistor tolerances contribute zero error
    • Hysteresis options: 5°C, 10°C and 20°C
  • detection
    • Channel A (overtemperature): +30 to +124°C, 2°C steps
    • Channel B (undertemperature): –50 to +25°C, 5°C steps
  • Accuracy level options (maximum at −55°C to +130°C):
    • A2 Level: ±3.0°C (±1.5°C from 0°C to +70°C)
    • A3 Level: ±3.5°C (±2.0°C from 0°C to +70°C)
  • Ultra-low power consumption: 0.5 µA typical at 25°C
  • Supply voltage: 1.62 to 5.5 V
  • Open-drain outputs
  • Trip test function enables in-system testing
  • Available in a SOT-563 (1.60-mm × 1.20-mm), 6-pin package

All trademarks are the property of their respective owners.

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The device is part of a family of ultra-low power, dual channel, resistor programmable temperature switches that enable protection and detection of system thermal events from . The . The trip temperatures (TTRIP) and thermal hysteresis (THYST) options are programmed by two E96-series resistors (1% tolerance) on the SETA and SETB pins. Channel A resistors can range from 1.05 KΩ to 909 KΩ, representing one of 48 unique values. Channel B resistors can range from 10.5 KΩ to 909 KΩ

The value of the resistor to ground on SETA input sets the TTRIP threshold of Channel A. The value of the resistor to ground on SETB input sets the TTRIP threshold of Channel B, as well as the THYST options of 5°C, or 10°C for both channels, to prevent undesired digital output switching. When the SETB input is connected to ground, Channel A operates with 20°C hysteresis. Resistors accuracy has no impact to TTRIP accuracy.

To enable customer board-level manufacturing, the supports a trip test function where the digital outputs are activated by exercising the SETA or SETB pin.

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Technical documentation

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Type Title Date
* Datasheet TMP390 Ultra-Small Dual-Channel 0.5-μA Resistor-Programmable Temperature Switch datasheet (Rev. A) Jul. 31, 2020
More literature TMP390EVM EU Declaration of Conformity (DoC) Apr. 28, 2020
White papers Ein Techniker-Leitfaden für Industrieroboter-Designs Mar. 25, 2020
Technical articles How to choose the right thermistor for your temperature sensing application Feb. 12, 2020
White papers E-book: An engineer’s guide to industrial robot designs Feb. 12, 2020
Technical articles Protect outdoor cameras from extreme weather with a temperature switch Jan. 13, 2020
Technical articles How to enable thermal safety for automotive infotainment and cluster systems Oct. 15, 2019
Application notes Self Diagnostics and Environmental Sensing in IP Network Cameras Oct. 10, 2019
Technical articles Driving industrial innovation with small-size sensors Sep. 12, 2019
User guides TMP390EVM User's Guide Sep. 13, 2018

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The TMP390 evaluation module (EVM) is a plug-and-play system to test and evaluate the TMP390 analog temperature switch. TMP390EVM features resistor-programmable inputs for the dual-channel switch with both hot and cold trip settings.

The EVM can be plugged into a USB port to supply power to the (...)

  • Dual-channel trip-point settings
  • Manual trip test
  • Manual reset
  • USB or external power-supply options
  • Detachable sensor board for prototyping

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SOT-5X3 (DRL) 6 View options

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