TCN75

2-WIRE SERIAL TEMPERATURE SENSOR AND THERMAL MONITOR PRELIMINARY INFORMATION TCN75 TCN75 2-WIRE SERIAL TEMPERATURE SENSOR AND THERMAL MONITOR FEATURES s s s s s s s s s s Solid State Temperature Sensing; 2°C Accuracy (Typ.) Operates from – 55°C to +125°C Operating Range ..................................... 2.7V - 5.5V 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 TCN75's May Share the Same Bus Shutdown Mode for Low Standby Power Consumption Low Power ......................... 250µA (Typ.) Operating 1µA (Typ.) Shutdown Mode 8-Pin Plastic DIP, SOIC, and MSOP Packaging perature exceeds a user-programmed setpoint. 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 setpoint and hysteresis, and configuring the device. The TCN75 powers up in Comparator Mode with a default setpoint of 80°C with 5°C hysteresis. Defaults allow independent operation as a stand-alone thermostat. A shutdown command may be sent via the 2-wire bus to activate the low-power standby mode. Address selection inputs allow up to eight TCN75's to share the same 2-wire bus for multi-zone m...