Temperature Sensor Digital Serial 1 Wire 3 Pin TO-92

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3-pin 1-Wire Programmable Resolution Digital Thermometer

The DS18B20 digital thermometer provides 9-bit to 12-bit Celsius temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points. The DS18B20 communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor.

It has an operating temperature range of -55°C to +125°C and is accurate to ±0.5°C over the range of -10°C to +85°C. In addition, the DS18B20 can derive power directly from the data line ("parasite power"), eliminating the need for an external power supply.


  • Unique 1-wire interface requires only one port pin for communication
  • Packaging: TO-92
  • Voltage: 3V to 5.5V

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Specification Value
Supplier PackageTO-92
Interface TypeSerial (1-Wire)
Output TypeDigital
Minimum Operating Supply Voltage3V
Typical Operating Supply Voltage3.3V|5V
Maximum Operating Supply Voltage5.5V
Minimum Operating Temperature-55°C
Maximum Operating Temperature125°C
MountingThrough Hole
Product Width3.94mm(Max)
Product Height4.95mm(Max)
Product Length4.95mm(Max)
Product TypeTemp Sensor

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