2.25 V low-voltage local digital temperature sensor

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.

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

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Design

Technical Documentation

Product Specifications
Description Version Size
DS6525 DS6525: 2.25 V low-voltage local digital temperature sensor 5.1 567 KB
User Manuals
Description Version Size
UM1479 UM1479: STEVAL-IPR002V1: M24LR64-R based data logger and event logger 1.0 3 MB

Publications and Collaterals

Brochures
Description Version Size
MEMS and Sensors, Smart solutions for IoT and enhanced user experience 1 MB
Support & Community

Sample & Buy

Part Number Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STTS751-0WB3F SOT23-6L Tape And Reel -40 125 NRND - - NEC EAR99 - MORE INFO
STTS751-0DP3F DFN6 2X2X0.5 Tape And Reel -40 125 Active - - NEC EAR99 - MORE INFO DISTRIBUTOR AVAILABILITY
STTS751-1DP3F DFN6 2X2X0.5 Tape And Reel -40 125 Active - - NEC EAR99 - MORE INFO DISTRIBUTOR AVAILABILITY
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(*) 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

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STTS751-0WB3F NRNDSOT23-6LIndustrialEcopack2
STTS751-0DP3F ActiveDFN6 2X2X0.5IndustrialEcopack2 0 0
STTS751-1DP3F ActiveDFN6 2X2X0.5IndustrialEcopack2 0 0
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(**) The Material Declaration forms available on st.com 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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