DS18B20 TEMPERATURE SENSOR
FEATURES
1．Unique 1-Wire® interface requires only one port pin for communication
2. Each device has a unique 64-bit serial code stored in an onboard ROM
3. Requires no external components
4.Can be powered from data line. Power supply range is 3.0V to 5.5V
5.Measures temperatures from –55°C to +125°C (–67°F to +257°F)
6.Alarm search command identifies and addresses devices whose temperature is outside of programmed limits (temperature alarm condition)
7.Software compatible with the DS1822.
8.Applications include thermostatic controls,industrial systems, consumer products,thermometers, or any thermally sensitive system
PIN DESCRIPTION
GND - Ground
DQ - Data In/Out
VDD - Power Supply Voltage
DESCRIPTION
The DS18B20 Digital Thermometer provides 9 to 12–bit centigrade 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 lin
