Low-Voltage, 1.8kHz PWM Output Temperature Sensors

Industry's Lowest Voltage PWM Output Temperature Sensor in Tiny SOT23 Package

Please check latest availability status for a specific part variant.


The MAX6676/MAX6677 are high-accuracy, low-power temperature sensors with a single-wire output. The MAX6676/MAX6677 convert the ambient temperature into a ratiometric PWM output with temperature information contained in the duty cycle of the output square wave. The MAX6676 has an open-drain output and the MAX6677 has a push-pull output.

The MAX6676/MAX6677 are specified for operation with power-supply voltages from 1.8V to 3.6V, or from 3.6V to 5.5V (MAX6676 only). The typical unloaded supply current is 80µA. All devices feature a single-wire output that minimizes the number of pins necessary to interface with a microprocessor (µP). The output is a square wave with a nominal frequency of 1.8kHz (±20%) at +25°C. The output format is decoded as follows:
Temperature (°C) = 398.15 x (t1 / t2) - 273.15
Where t1 is fixed with a typical value of 0.24ms and t2 is modulated by the temperature. The MAX6676/ MAX6677 operate from -40°C to +125°C and are available in space-saving 6-pin SOT23 packages.
MAX6676, MAX6677:Typical Operating Circuit MAX6676, MAX6677: Typical Operating Circuit Enlarge+

Key Features

  • Simple Single-Wire, 1.8kHz PWM Output
  • Operates Down to 1.8V
  • High Accuracy
    • ±1.5°C at TA= +25°C
    • ±3.0°C at TA = 0°C to +85°C
  • Operates from -40°C to +125°C
  • Low 80µA Typical Current Consumption
  • Small 6-Pin SOT23 Package


  • HVAC and Environmental Control
  • Industrial
  • Isolated Temperature Sensing
  • Portable Devices
  • Process Control
  • µP and µC Temperature Monitoring

Additional Resources

Temperature Family by Product Type
Request Reliability Report for: MAX6676 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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