The Microchip TCN75 series serially programmable temperature sensor notifies the host controller when ambient temperature exceeds a user programmed set point. Hysteresis is also programmable. The INT/CMPTR output is programmable as either a simple comparator for thermostat operation or as a temperature event interrupt. Communication with the TCN75 is accomplished via a two-wire bus that is compatible with industry standard protocols. This permits reading the current temperature, programming the set point and hysteresis, and configuring the device.

Solid state temperature sensing 0.5°C accuracy typical
Operates from -55 °C to +125 °C
Operating supply range 2.7 V to 5.5 V
Programmable trip point and hysteresis with power-up defaults
Standard 2-Wire serial interface
Thermal event alarm output functions as interrupt or comparator/thermostat output
Up to 8 TCN75s may share the same bus
Shutdown mode for low standby power consumption
5V Tolerant I/O at VDD = 3V
Low power 250 micro A typical operating