DS18B20

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. 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. Applications ●● Thermostatic Controls ●● Industrial Systems ●● Consumer Products ●● Thermometers ●● Thermally Sensitive Systems Ordering Information appears at end of data sheet. 1-Wire is a registered trademark of Maxim Integrated Products, Inc. Benefits and 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 ...