Automotive grade, ultra-small, dual-channel, 0.5-μA, resistor-programmable temperature switch


Product details


SetPoint type Resistor Programmable SetPoint value (deg C) -40C 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 Automotive Interface type Switch TI functional safety category Functional Safety-Capable open-in-new Find other Temperature switches

Package | Pins | Size

SOT-5X3 (DRL) 6 open-in-new Find other Temperature switches


  • AEC-Q100 qualified with the following results:
    • Temperature grade 1: –40°C to +125°C operating temperature range
    • Extended operating temperature range: −55°C to +130°C
  • Resistor programmable temperature trip points and hysteresis options
    • Resistor tolerances contribute zero error
    • Hysteresis options: 5°C, 10°C and 20°C
  • Separate outputs for overtemperature or undertemperature detection
    • Channel A (overtemperature): +30 to +124°C, 2°C steps
    • Channel B (undertemperature): –50 to +25°C, 5°C steps
  • Accuracy without calibration
    • ±1.5°C (maximum) from 0°C to +70°C
    • ±3.0°C (maximum) from −55°C to +130°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.

open-in-new Find other Temperature switches


The TMP390-Q1 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 –55°C to 130°C. The TMP390-Q1 offers independent overtemperature (hot) and undertemperature (cold) detection. 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 TMP390-Q1 supports a trip test function where the digital outputs are activated by exercising the SETA or SETB pin.

open-in-new Find other Temperature switches

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 6
Type Title Date
* Datasheet TMP390-Q1 Ultra-Small, Dual-Channel (Hot and Cold Trip), 0.5-µA, Resistor-Programmable Temperature Switch datasheet (Rev. A) Apr. 02, 2020
Functional safety information TMP390-Q1 Functional Safety FIT Rate and FMD May 12, 2020
Technical articles How to choose the right thermistor for your temperature sensing application Feb. 12, 2020
Technical articles How to enable thermal safety for automotive infotainment and cluster systems Oct. 15, 2019
Technical articles Driving industrial innovation with small-size sensors Sep. 12, 2019
Technical articles How sensor technology is evolving to meet cold chain needs Jun. 18, 2018

Design & development

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

Hardware development


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

CAD/CAE symbols

Package Pins Download
SOT-5X3 (DRL) 6 View options

Ordering & quality

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​


Related videos