DS18B20 Temperature Sensor
DS18B20 Temperature Sensor Diagram
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.
Specifications
Bit Rate
9 Bits to 12 Bits
Operating Voltage
3V ~ 5.5V
Temperature Range
-55°C to +125°C
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