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TMP100 I2C Temperature Sensor

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by Ray

Digital I2C temperature sensor with up to 12-bit resolution and address pins.

temperaturesensori2cdigitalmicrochiptisot-23-6
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TMP100

Texas Instruments · Temperature Sensor · SOT-23-6

The TMP100 is a digital temperature sensor with an I2C interface and up to 12-bit (0.0625 C) resolution. Two address pins let several sensors share one bus. It reports temperature directly with +-2 C accuracy over its range, suiting thermal monitoring and management in a compact SOT-23-6.

Pinout

Pin Name Type Function
1 SCL input I2C/SMBus serial clock input. Open-drain; requires an external pull-up resistor to V+. Supports Fast Mode (up to 400 kHz) and High-Speed Mode (up to 3.4 MHz).
2 GND power_in Ground reference for the device. Connect to the system ground plane.
3 ADD1 input Address-select input 1. Tie to GND, V+, or leave floating to set one of the tri-state address bits, allowing up to eight TMP100 devices on the same I2C bus.
4 V+ power_in Positive supply voltage input. Operating range 2.7 V to 5.5 V; absolute maximum 7.5 V. Bypass with a 0.1 µF ceramic capacitor to GND close to the pin.
5 ADD0 input Address-select input 0. Tie to GND, V+, or leave floating to set one of the tri-state address bits used to program the I2C slave address.
6 SDA bidirectional I2C/SMBus serial data line. Open-drain; requires an external pull-up resistor to V+. Low-level output voltage 0.15 V typ at I_OL = 3 mA.

Key specifications

Parameter Value
Type Digital I2C temperature sensor
Resolution 9 to 12-bit (selectable)
Accuracy +-2 C (-25 to 85 C)
Interface I2C / SMBus
Addressing 2 address pins
Supply voltage 2.7 V to 5.5 V
Operating temperature -55 C to 125 C

Ordering variants

Same part, different packaging or reel option.

  • TMP100DBV

CAD (KiCad official)

  • Symbol: tmp100.kicad_sym
  • Footprint: tmp100.kicad_mod
  • 3D model: SOT-23-6 body from KiCad Package_TO_SOT_SMD/SOT-23-6.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (31 pp, sha256 4099b7e562d93331, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF