Keyes DS18B20 Temperature Sensor


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2,500 Ks

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Detail about DS18B20 Temperature Sensor


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. 

Each DS18B20 has a unique 64-bit serial code, which allows multiple DS18B20s to function on the same 1-Wire bus. Thus, it is simple to use one microprocessor to control many DS18B20s distributed over a large area. Applications that can benefit from this feature include HVAC environmental controls, temperature monitoring systems inside buildings, equipment, or machinery, and process monitoring and control systems. 

The Keyes Digital Temperature Sensor Module measures from -55°C to +125'C with +/- 0.5'C accuracy. The temperature sensor module has an operating voltage of 5v and is compatible with Arduino systems.  


  • Unique 1-Wire® Interface Requires Only One Port Pin for Communication
  • Each Device has a Unique 64-Bit Serial Code Stored in an On- Board ROM
  • 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
  • Measures Temperatures from -55°C to +125°C (-67°F to +257°F)
  • ±0.5°C Accuracy from -10°C to +85°C
  • Thermometer Resolution is User Selectable Pin Configurations appear at end of data sheet. 
  • from 9 to 12 Bits
  • Functional Diagrams continued at end of data sheet. 
  • Dimensions:  26 x 15 x 8mm
  • Weight: 1.34g
  • Operating Voltage: 5v
  • Material: FR4

Pin Map

  • Y  : Output
  • R : Supply ( 5V )
  • G : Ground

Documents & Simple Codes

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