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DS1621-Digital Thermometer & Thermostat IC

DS1621-Digital Thermometer & Thermostat IC
Out of Stock
DS1621-Digital Thermometer & Thermostat IC
  • Stock: Out of Stock
  • Model: TPS-00206
  • Weight: 5.00g
150 samples sold
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DS1621-Digital Thermometer & Thermostat        


  • Temperature measurements require no external components.
  • Measures temperatures from -55°C to +125°C in 0.5°C increments. Fahrenheit equivalent is -67°F to 257°F in 0.9°F increments.
  • Temperature is read as a 9-bit value (2-byte transfer).
  • Wide power supply range (2.7V to 5.5V).
  • Converts temperature to the digital word in less than 1 second.
  • Thermostatic settings are user definable and nonvolatile.
  • Data is read from/written via a 2-wire serial interface (open drain I/O lines).
  • Applications include thermostatic controls, industrial systems, consumer products, thermometers, or any thermal sensitive system.
  • 8-pin DIP or SO package (150mil and 208mil).


The DS1621 Digital Thermometer and Thermostat provides 9-bit temperature readings, which indicate the temperature of the device. The thermal alarm output, TOUT, is active when the temperature of the device exceeds a user-defined temperature TH. The output remains active until the temperature drops below user-defined temperature TL, allowing for any hysteresis necessary.

User-defined temperature settings are stored in nonvolatile memory so parts may be programmed prior to insertion in a system. Temperature settings and temperature readings are all communicated to/from the DS1621 over a simple 2-wire serial interface.

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Download the Manual and software here