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LM75B

ACTIVE

±2°C, 3.0V to 5.5V industry standard temperature sensor with I2C/SMBus interface

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Data sheet

LM75B

ACTIVE
Data sheet Order now

Product details

Local sensor accuracy (max) 2 Type Local Operating temperature range (°C) -55 to 125 Supply voltage (min) (V) 3 Interface type I2C, SMBus Supply voltage (max) (V) 5.5 Features UL recognized Supply current (max) (µA) 500 Temp resolution (max) (bps) 9 Remote channels (#) 0 Addresses 8 Rating Catalog
Local sensor accuracy (max) 2 Type Local Operating temperature range (°C) -55 to 125 Supply voltage (min) (V) 3 Interface type I2C, SMBus Supply voltage (max) (V) 5.5 Features UL recognized Supply current (max) (µA) 500 Temp resolution (max) (bps) 9 Remote channels (#) 0 Addresses 8 Rating Catalog
SOIC (D) 8 29.4 mm² 4.9 x 6 VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • No External Components Required
  • Shutdown Mode to Minimize Power Consumption
  • Up to Eight LM75s Can be Connected to a Single Bus
  • Power Up Defaults Permit Stand-alone Operation as Thermostat
  • UL Recognized Component (LM75B and LM75C)
  • Key Specifications:
    • Supply Voltage
      • LM75B, LM75C: 3 V to 5.5 V
    • Supply Current
      • Operating: 280 μA (typical)
      • Shutdown: 4 μA (typical)
    • Temperature Accuracy
      • −25°C to 100°C: ±2°C (maximum)
      • −55°C to 125°C: ±3°C (maximum)

All trademarks are the property of their respective owners.

  • No External Components Required
  • Shutdown Mode to Minimize Power Consumption
  • Up to Eight LM75s Can be Connected to a Single Bus
  • Power Up Defaults Permit Stand-alone Operation as Thermostat
  • UL Recognized Component (LM75B and LM75C)
  • Key Specifications:
    • Supply Voltage
      • LM75B, LM75C: 3 V to 5.5 V
    • Supply Current
      • Operating: 280 μA (typical)
      • Shutdown: 4 μA (typical)
    • Temperature Accuracy
      • −25°C to 100°C: ±2°C (maximum)
      • −55°C to 125°C: ±3°C (maximum)

All trademarks are the property of their respective owners.

The LM75B and LM75C are industry-standard digital temperature sensors with an integrated Sigma-Delta analog-to-digital converter and I2C interface. The LM75 provides 9-bit digital temperature readings with an accuracy of ±2°C from -25°C to 100°C and ±3°C over –55°C to 125°C.

Communication is accomplished over a 2-wire interface which operates up to 400kHz. The LM75 has three address pins, allowing up to eight LM75 devices to operate on the same 2-wire bus. The LM75 has a dedicated over-temperature output (O.S.) with programmable limit and hystersis. This output has programmable fault tolerance, which allows the user to define the number of consecutive error conditions that must occur before O.S. is activated.

The wide temperature and supply range and I2C interface make the LM75 ideal for a number of applications including base stations, electronic test equipment, office electronics, personal computers, and any other system where thermal management is critical to performance. The LM75B and LM75C are available in an SOIC package or VSSOP package.

The LM75B and LM75C are industry-standard digital temperature sensors with an integrated Sigma-Delta analog-to-digital converter and I2C interface. The LM75 provides 9-bit digital temperature readings with an accuracy of ±2°C from -25°C to 100°C and ±3°C over –55°C to 125°C.

Communication is accomplished over a 2-wire interface which operates up to 400kHz. The LM75 has three address pins, allowing up to eight LM75 devices to operate on the same 2-wire bus. The LM75 has a dedicated over-temperature output (O.S.) with programmable limit and hystersis. This output has programmable fault tolerance, which allows the user to define the number of consecutive error conditions that must occur before O.S. is activated.

The wide temperature and supply range and I2C interface make the LM75 ideal for a number of applications including base stations, electronic test equipment, office electronics, personal computers, and any other system where thermal management is critical to performance. The LM75B and LM75C are available in an SOIC package or VSSOP package.
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Technical documentation

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Type Title Date
* Data sheet LM75x Digital Temperature Sensor and Thermal Watchdog With Two-Wire Interface datasheet (Rev. D) PDF | HTML 15 Oct 2015
Application note How to Read and Interpret Digital Temperature Sensor Output Data PDF | HTML 12 Apr 2024
Application note LM75B and TMP1075 Industry-Standard Devices: Design Guidelines and Spec Comparison (Rev. A) PDF | HTML 07 Mar 2024
Application note Applying I2C-Compatible Temperature Sensors in Systems With Slow Clock Edges (Rev. A) 06 May 2013
Application note Tiny Temperature Sensors for Remote Systems 17 Feb 2003

Design & development

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Reference designs

TIDA-010008 — Flat-Clamp TVS based Reference Design for Protection Against Transient for Grid Applications

This reference design features multiple approaches for  protecting AC or DC analog input, DC analog output, AC or DC binary input, digital output with a high side or low side driver, LCD bias supply, USB interfaces (power and data) and onboard power supplies with 24, 12 or 5V input used in (...)
Design guide: PDF
Schematic: PDF
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SOIC (D) 8 Ultra Librarian
VSSOP (DGK) 8 Ultra Librarian
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