LM92 ±0.5°C Temperature Sensor with Alert Function and I2C/SMBus Interface | TI.com

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±0.5°C Temperature Sensor with Alert Function and I2C/SMBus Interface



The LM92 is a digital temperature sensor and thermal window comparator with an I2C Serial Bus interface and an accuracy of ±0.33°C. The window-comparator architecture of the LM92 eases the design of temperature control systems. The open-drain Interrupt (INT) output becomes active whenever temperature goes outside a programmable window, while a separate Critical Temperature Alarm (T_CRIT_A) output becomes active when the temperature exceeds a programmable critical limit. The INT output can operate in either a comparator or event mode, while the T_CRIT_A output operates in comparator mode only.

The host can program both the upper and lower limits of the window as well as the critical temperature limit. Programmable Hysteresis as well as a fault queue are available to minimize false tripping. Two pins (A0, A1) are available for address selection. The sensor powers up with default thresholds of 2°C THYST, 10°C TLOW, 64°C THIGH, and 80°C T_CRIT.

The LM92's 2.7V to 5.5V supply voltage range, Serial Bus interface, 12-bit + sign output, and full-scale range of over 128°C make it ideal for a wide range of applications. These include thermal management and protection applications in personal computers, electronic test equipment, office electronics, automotive, medical and HVAC applications.


  • Window Comparison Simplifies Design of ACPI-Compatible Temperature Monitoring and Control
  • Serial Bus Interface
  • Separate Open-Drain Outputs for Interrupt and Critical Temperature Shutdown
  • Shutdown Mode to Minimize Power Consumption
  • Up to Four LM92s can be Connected to a Single Bus
  • 12-Bit + Sign Output
  • Operation up to 150°C

Key Specifications

  • Supply Voltage 2.7V to 5.5V
  • Supply Current operating 350 μA (typ) 625 μA (max) shutdown 5 μA (typ)
  • Temperature Accuracy
    • 30°C, ±0.33°C (max)
    • 10°C to 50°C, ±0.50°C (max)
    • −10°C to 85°C, ±1.0°C (max)
    • 125°C, ±1.25°C (max)
    • −25°C to 150°C, ±1.5°C (max)
  • Linearity ±0.5°C (max)
  • Resolution 0.0625°C

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Part number Order Device type Interface Local sensor accuracy (Max) (+/- C) Temp resolution (Max) (bits) Operating temperature range (C) Supply voltage (Min) (V) Supply voltage (Max) (V) Supply current (Max) (uA) Features Remote channels (#) Addresses Rating Package Group Package size: mm2:W x L (PKG) Approx. price (US$)
LM92 Order now Local     I2C, SMBus, 2-Wire     0.5     13     -55 to 150     2.7     5.5     625     ALERT     0     4     Catalog     SOIC | 8     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)     2.13 | 1ku    
LM95234 Order now Remote     I2C, SMBus, 2-Wire     2     11     -40 to 140     2.7     5.5     800     One-shot conversion
4     3     Catalog     WSON | 14     14WSON: 16 mm2: 4 x 4 (WSON | 14)     0.91 | 1ku    
LM95241 Order now Remote     I2C, SMBus, 2-Wire     3     10     0 to 85     2.7     5.5     640     One-shot conversion
2     3     Catalog     VSSOP | 8     8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)     0.70 | 1ku