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MultiVision Technology

Sonoff – DS18B20 Waterproof Temperature Sensor


      • Unique 1-Wire interface requires only one port pin for communication
      • Multidrop capability simplifies distributed temperature sensing applications
      • Requires no external components
      • Can be powered from data line. Power supply range is 3.0V to 5.5V
      • Zero standby power required
      • Measures temperatures from -55°C to +125°C
      • ±0.5°C accuracy from -10°C to +85°C
      • Thermometer resolution is programmable from 9 to 12 bits
      • Converts 12-bit temperature to digital word in 750 ms (max.)
      • User-definable, nonvolatile temperature alarm settings
      • Alarm search command identifies and addresses devices whose temperature is outside of programmed limits (temperature alarm condition)
      • Applications include thermostatic controls, industrial systems, consumer products, thermometers, or any thermally sensitive system


The DS18B20 Digital Thermometer provides 9 to 12-bit (configurable) temperature readings which
indicate the temperature of the device.

Information is sent to/from the DS18B20 over a 1-Wire interface, so that only one wire (and ground)
needs to be connected from a central microprocessor to a DS18B20. Power for reading, writing, and
performing temperature conversions can be derived from the data line itself with no need for an external
power source.


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