DS1821 TO-92 Temperature Sensor IC

DS1821 can function as a standalone thermostat with user-programmable trip points or as an 8-bit temperature sensor with a 1-Wire digital interface. Thermostat trip points are stored in non-volatile memory, so DS1821 units can be programmed before the system is installed for true stand-alone operation. The DS1821 has an operating temperature range of –55°C to +125°C and is accurate to ±1°C from 0°C to +85°C. Communication with the DS1821 is via the open-drain DQ pin; This pin also serves as thermostat output.