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2.25 V low-voltage local digital temperature sensor
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The STTS751 is a digital temperature sensor which communicates over a 2-wire SMBus 2.0 compatible bus. The temperature is measured with a user-configurable resolution between 9 and 12 bits. At 9 bits, the smallest step size is 0.5 °C, and at 12 bits, it is 0.0625 °C. At the default resolution (10 bits, 0.25 °C/LSB), the conversion time is nominally 21 milliseconds.

The open-drain EVENToutput is used to indicate an alarm condition in which the measured temperature has exceeded the user-programmed high limit or fallen below the low limit. When the EVENTpin is asserted, the host can respond using the SMBus Alert Response Address (ARA) protocol to which the STTS751 will respond by sending its slave address.

The STTS751 is a 6-pin device that supports user-configurable slave addresses. Via the pull-up resistor on the Addr/Thermpin, one of four different slave addresses can be specified. Two order numbers (STTS751-0 and STTS751-1) provide two different sets of slave addresses bringing the total available to eight. Thus, up to eight devices can share the same 2-wire SMBus without ambiguity, thereby allowing monitoring of multiple temperature zones in an application.

The two-wire interface can support transfer rates up to 400 kHz. Two small footprint packages are available: a UDFN-6L and a standard SOT23-6L package.

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Errata Sheet
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Key Features

  • Operating voltage 2.25 V to 3.6 V
  • Operating temperature –40 °C to +125 °C
  • Programmable
  • 10 different conversion rates 0.0625 to 32 conversions/sec. 1 conversion/sec. - default
  • 4 different resolutions 9-bit (0.5 °C/LSB) to 12-bit (0.0625 °C/LSB) 10-bit (0.25 °C/LSB) - default
  • Low supply current
  • 50 μA (typ) for 8 conversions/sec.
  • 20 μA (typ) for 1 conversion/sec.
  • 3 μA (typ) standby
  • Accuracy
  • ±1.0 °C (typ) 0 °C to +85 °C
  • ±2.0 °C (typ) –40 °C to +125 °C
  • One-shot mode for power saving
  • Fast conversion time 21 ms (typ) 10-bit
  • Pull-up resistor value allows single pin to select one of four slave addresses
  • Supports 400 kHz serial clock
  • SMBus 2.0 compatible
  • SMBus ALERT (ARA) support
  • SMBus timeout
  • RoHS/green

Circuit Diagram

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS6525: 2.25 V low-voltage local digital temperature sensor
5.1 568 KB

User Manual

Description Version Size
UM1479: STEVAL-IPR002V1: M24LR64-R based data logger and event logger
1.0 3,484 KB

Publications and Collaterals


Description Version Size
STTS751 - High-accuracy 2.25 V digital temperature sensor with dual alarm
1.0.0 515 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**
STTS751-0DP3FActiveDFN6 2X2X0.5Tape And Reel-40125_-.4Distributor reported inventory date: 2016-02-29
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA53753000
STTS751-0WB3FNRNDSOT23-6LTape And Reel-40125_-Distributor reported inventory date: 2016-02-29
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA7993000
STTS751-1DP3FActiveDFN6 2X2X0.5Tape And Reel-40125_-.3Distributor reported inventory date: 2016-02-29
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA30003000
RUTRONIKOrder NowEUROPE150003000

(*) 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.