(ACTIVE) Temperature Sensor with I2C/SMBus Interface in Industry Standard LM75 Form Factor & Pinout


Functional diagram


The TMP75 and TMP175 devices are digital temperature sensors ideal for NTC and PTC thermistor replacement. The devices offer a typical accuracy of ±1°C without requiring calibration or external component signal conditioning. IC temperature sensors are highly linear and do not require complex calculations or look-up tables to derive the temperature. The on-chip 12-bit ADC offers resolutions down to 0.0625°C. The devices are available in the industry standard LM75 SOIC-8 and MSOP-8 footprint.

The TMP175 and TMP75 feature SMBus, Two-Wire, and I2C interface compatibility. The TMP175 device allows up to 27 devices on one bus. The TMP75 allows up to eight 8 on one bus. The TMP175 and TMP75 both feature an SMBus Alert function.

The TMP175 and TMP75 devices are ideal for extended temperature measurement in a variety of communication, computer, consumer, environmental, industrial, and instrumentation applications.

The TMP175 and TMP75 devices are specified for operation over a temperature range of –40°C to 125°C.

The TMP75 production units are 100% tested against sensors that are NIST traceable and are verified with equipment that are NIST traceable through ISO/IEC 17025 accredited calibrations.


  • TMP175: 27 Addresses
  • TMP75: 8 Addresses, NIST Traceable
  • Digital Output: SMBus™, Two-Wire™, and I2C
    Interface Compatibility
  • Resolution: 9 to 12 Bits, User-Selectable
  • Accuracy:
    • ±1°C (Typical) from –40°C to 125°C
    • ±2°C (Maximum) from –40°C to 125°C
  • Low Quiescent Current: 50-µA, 0.1-µA Standby
  • Wide Supply Range: 2.7 V to 5.5 V
  • Small 8-Pin MSOP and 8-Pin SOIC Packages


Interface I2C, SMBus, 2-Wire   
Local Sensor Accuracy (Max) (+/- C) 1.5   
Temp Resolution (Max) (bits) 12   
Operating Temperature Range (C) -40 to 125   
Supply Voltage (Min) (V) 2.7   
Supply Voltage (Max) (V) 5.5   
Supply Current (Typ) (uA) 50   
Supply Current (Max) (uA) 85   
Special Features Configurable Resolution^Programmable Alert^Fault Queue^One-Shot Conversion^Shutdown   
Addresses 8   
Rating Catalog   
Package Group SOIC^VSSOP   
Package Size: mm2:W x L (PKG) 8VSSOP: 15 mm2: 4.9 x 3(VSSOP)^8SOIC: 29 mm2: 6 x 4.9(SOIC)   
Approx. Price (US$) 0.45 | 1ku   
Iq (Typ) (uA) 50   

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Datasheet (1)

Application notes (3)

Selection guides (2)

Solution guides (3)

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