The TC74 is a serially accessible， digital temperature sensor particularly suited for low cost and small formfactor applications. Temperature data is converted from the onboard thermal sensing element and made available as an 8-bit digital word. Communication with the TC74 is accomplished via a 2- wire SMBus/I2C compatible serial port. This bus also can be used to implement multi-drop/multi-zone monitoring. The SHDN bit in the CONFIG register can be used to activate the low power Standby mode. Temperature resolution is 1°C. Conversion rate is a nominal 8 samples/sec. During normal operation， the quiescent current is 200 μA （typ）。 During standby operation， the quiescent current is 5 μA （typ）。 Small size， low installed cost and ease of use make the TC74 an ideal choice for implementing thermal management in a variety of systems.