Product details

Local sensor accuracy (Max) (+/- C) 1 Type Remote Operating temperature range (C) -40 to 125 Supply voltage (Min) (V) 2.7 Interface type I2C, SMBus Supply voltage (Max) (V) 5.5 Supply current (Max) (uA) 45 Temp resolution (Max) (bits) 12 Features One-shot conversion Remote channels (#) 2 Addresses 2 Rating Catalog
Local sensor accuracy (Max) (+/- C) 1 Type Remote Operating temperature range (C) -40 to 125 Supply voltage (Min) (V) 2.7 Interface type I2C, SMBus Supply voltage (Max) (V) 5.5 Supply current (Max) (uA) 45 Temp resolution (Max) (bits) 12 Features One-shot conversion Remote channels (#) 2 Addresses 2 Rating Catalog
SOT-23 (DCN) 8 8 mm² 2.9 x 2.8
  • SOT23-8 PACKAGE
  • ±1°C REMOTE DIODE SENSOR (MAX)
  • ±1°C LOCAL TEMPERATURE SENSOR (MAX)
  • AUTOMATIC BETA COMPENSATION
  • SERIES RESISTANCE CANCELLATION
  • -FACTOR CORRECTION
  • TWO-WIRE/SMBus™ SERIAL INTERFACE
  • MULTIPLE INTERFACE ADDRESSES
  • DIODE FAULT DETECTION
  • RoHS-COMPLIANT AND NO Sb/Br
  • TRANSISTOR AND DIODE MODEL OPERATION
  • APPLICATIONS
    • PROCESSOR/FPGA TEMPERATURE MONITORING
    • LCD/DLP®/LCOS PROJECTORS
    • SERVERS
    • CENTRAL OFFICE TELECOM EQUIPMENT
    • STORAGE AREA NETWORKS (SAN)

DLP is a registered trademark of Texas Instruments.
SMBus is a trademark of Intel Corporation.
All other trademarks are the property of their respective owners.

  • SOT23-8 PACKAGE
  • ±1°C REMOTE DIODE SENSOR (MAX)
  • ±1°C LOCAL TEMPERATURE SENSOR (MAX)
  • AUTOMATIC BETA COMPENSATION
  • SERIES RESISTANCE CANCELLATION
  • -FACTOR CORRECTION
  • TWO-WIRE/SMBus™ SERIAL INTERFACE
  • MULTIPLE INTERFACE ADDRESSES
  • DIODE FAULT DETECTION
  • RoHS-COMPLIANT AND NO Sb/Br
  • TRANSISTOR AND DIODE MODEL OPERATION
  • APPLICATIONS
    • PROCESSOR/FPGA TEMPERATURE MONITORING
    • LCD/DLP®/LCOS PROJECTORS
    • SERVERS
    • CENTRAL OFFICE TELECOM EQUIPMENT
    • STORAGE AREA NETWORKS (SAN)

DLP is a registered trademark of Texas Instruments.
SMBus is a trademark of Intel Corporation.
All other trademarks are the property of their respective owners.

The TMP441 and TMP442 are remote temperature monitors with a built-in local temperature sensor. Remote temperature sensor diode-connected transistors are typically low-cost, NPN- or PNP-type transistors or diodes that are an integral part of microcontrollers, microprocessors, or field-programmable gate arrays (FPGAs).

Remote accuracy is ±1°C for multiple IC manufacturers, with no calibration needed. The Two-Wire serial interface accepts SMBus write byte, read byte, send byte, and receive byte commands to configure the device.

The TMP441 has a single remote temperature monitor with address pins. The TMP442 has dual remote temperature monitors, and is available with two different interface addresses. All versions include automatic beta compensation (correction), series resistance cancellation, programmable non-ideality factor (-factor), wide remote temperature measurement range (up to +150°C), and diode fault detection.

The TMP441 and TMP442 are both available in an 8-lead, SOT23 package.

The TMP441 and TMP442 are remote temperature monitors with a built-in local temperature sensor. Remote temperature sensor diode-connected transistors are typically low-cost, NPN- or PNP-type transistors or diodes that are an integral part of microcontrollers, microprocessors, or field-programmable gate arrays (FPGAs).

Remote accuracy is ±1°C for multiple IC manufacturers, with no calibration needed. The Two-Wire serial interface accepts SMBus write byte, read byte, send byte, and receive byte commands to configure the device.

The TMP441 has a single remote temperature monitor with address pins. The TMP442 has dual remote temperature monitors, and is available with two different interface addresses. All versions include automatic beta compensation (correction), series resistance cancellation, programmable non-ideality factor (-factor), wide remote temperature measurement range (up to +150°C), and diode fault detection.

The TMP441 and TMP442 are both available in an 8-lead, SOT23 package.

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Technical documentation

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Type Title Date
* Data sheet ±1°C TEMPERATURE SENSOR w/Auto Beta Correction, Series-R, and n-Factor datasheet (Rev. A) 20 Mar 2009
Technical article How to choose the right thermistor for your temperature sensing application 13 Feb 2020
Technical article How to enable thermal safety for automotive infotainment and cluster systems 15 Oct 2019
Technical article Driving industrial innovation with small-size sensors 12 Sep 2019
Technical article How to select a temperature sensor probe 18 Feb 2016

Design & development

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

Driver or library

TMP421SW-LINUX — Linux Driver for TMP421

The Linux driver supports the TMP421 series of Remote and Local Temp Sensors. The Linux driver supports communication through the I2C bus and interfaces with the Hardware Monitoring sub-system.
Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:
  • (...)
Simulation model

TMP4xx Family IBIS Model (Rev. A)

SBOM410A.ZIP (60 KB) - IBIS Model
Package Pins Download
SOT-23 (DCN) 8 View options

Ordering & quality

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