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DS18B20 - 1-Wire Digital Thermometer

General Description

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.

Key Features

  • Unique 1-Wire® Interface Requires Only One Port Pin for Communication.
  • Reduce Component Count with Integrated Temperature Sensor and EEPROM.
  • Measures Temperatures from -55°C to +125°C (-67°F to +257°F).
  • ±0.5°C Accuracy from -10°C to +85°C.
  • Programmable Resolution from 9 Bits to 12 Bits.
  • No External Components Required.
  • Parasitic Power Mode Requires Only 2 Pins for Operation (DQ and GND).
  • Simplifies Distributed Temperatu.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Click here for production status of specific part numbers. DS18B20 Programmable Resolution 1-Wire Digital Thermometer General Description 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. In addition, the DS18B20 can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply. Each DS18B20 has a unique 64-bit serial code, which allows multiple DS18B20s to function on the same 1-Wire bus.