The DS620 digital thermometer and thermostat provides low-voltage temperature measurements with ±0.5°C accuracy from 0°C to +70°C and an operating temperature range of -55°C to +125°C. It communicates over a 2-wire digital interface and is multidroppable for distributed-sensing applications. The DS620 has thermostat functionality with user-defined thresholds stored in EEPROM registers, and it can be configured for standalone thermostat operation. The programmable output (PO) pin serves as the thermostat output and can also function as an active-low control for peripheral devices.