... Supply Voltagethermometers, or any thermally sensitive NC - No ConnectsystemThe DS18B20 Digital Thermometer provides 9 to 12-bit (configurable) temperature ... to be connected from a central microprocessor to a DS18B20. Power for reading, writing, andperforming temperature conversions ... no need for an externalpower source. Because each DS18B20 contains a unique silicon serial number, multiple DS18B20s ...