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Digital temperature sensor and thermal watchdog
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The STTS75 is a high-precision CMOS (digital) temperature sensor IC with a delta-sigma analog-to-digital (ADC) converter and an I2C-compatible serial digital interface. It is targeted for general applications such as personal computers, system thermal management, electronics equipment, and industrial controllers, and is packaged in the industry standard 8-lead MSOP(TSSOP) and SO8 packages.

The device contains a band gap temperature sensor and programmable 9- to 12-bit ADC which monitor and digitize the temperature to a resolution up to 0.0625 °C. The STTS75 is typically accurate to (±3 °C - max) over the full temperature measurement range of –55 °C to 125 °C with ±2 °C accuracy in the –25 °C to +100 °C range. At power-up, the STTS75 defaults to 9-bit resolution for software compatibility with the STLM75.

The STTS75 is specified for operating at supply voltages from 2.7 V to 5.5 V. Operating at 3.3 V, the supply current is typically (75 μA).

The onboard delta-sigma analog-to-digital converter (ADC) converts the measured temperature to a digital value that is calibrated in °C; for Fahrenheit applications a lookup table or conversion routine is required.

The STTS75 is factory-calibrated and requires no external components to measure temperature.

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Errata Sheet
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Key Features

  • Measures temperatures from –55 °C to +125 °C (–67 °F to +257 °F)
  • ±0.5 °C (typ) accuracy
  • ±2 °C (max) accuracy from –25 °C to +100 °C
  • Low operating current: 75 μA (typ)
  • No external components required
  • 2-wire I2C/SMBus-compatible serial interface
  • Selectable serial bus address allows connection of up to eight devices on the same bus
  • Thermometer resolution is user-configurable from 9 (default) to 12 bits (0.5 °C to 0.0625 °C)
  • 9-bit conversion time is 45 ms (typ)
  • Programmable temperature threshold and hysteresis set points
  • Wide power supply range-operating voltage range: 2.7 V to 5.5 V
  • Power saving one-shot temperature measurement
  • Power-up defaults permit standalone operation as thermostat
  • Shutdown mode to minimize power consumption
  • Separate open drain output pin operates as an interrupt or comparator/thermostat output (dual purpose event pin)
  • Packages:
  • SO8
  • MSOP8 (TSSOP8)

Circuit Diagram

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS5157: Digital temperature sensor and thermal watchdog
11.1 665 KB

Publications and Collaterals


Description Version Size
1.0 707 KB


Description Version Size
MEMS and Sensors, Smart solutions for IoT and enhanced user experience
6.0 1,594 KB

Sample & Buy

Part Number Marketing StatusPackagePacking TypeOperating Temperature (min) Operating Temperature (max) Automotive GradeOrder From STUnit Price (US$)*
@ 1000
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STTS75DS2FActiveMSOP/TSSOP 8Tape And Reel-55125_-.35Distributor reported inventory date: 2015-12-01
Distributor NameRegionStockMin. order
STTS75M2FActiveSO-8Tape And Reel-55125_-.4Distributor reported inventory date: 2015-12-01
Distributor NameRegionStockMin. order
Ecopack1 (*)PDF

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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