GENERAL DESCRIPTION
The TCM1617 is a serially programmable temperature sensor optimized for monitoring modern high performance CPUs with on-board integrated thermal diodes. Temperature data is converted from the CPU’s thermal diode outputs and made available as an 8-Bit digital word.
Communication with the TCM1617 is accomplished via the standard System Management Bus (SMBus) commonly used in modern computer systems. This permits reading the current internal/external temperature, programming the threshold setpoints, and configuring the device. Additionally, an interrupt is generated on the ALERT# pin when temperature moves outside the preset threshold windows in either direction.

FEATURES
■ Includes Internal External Sensing Capability
■ Outputs Temperature as 8-Bit Digital Word
■ Solid State Temperature Sensing; 1°C Resolution
■ 3.0 – 5.5V Operating Range
■ Independent Internal and External Threshold
   Set-Points With ALERT# Interrupt Output
■ SMBus 2-Wire Serial Interface
■ Up To Nine TCM1617s May Share the Same Bus
■ Standby Mode for Low Standby Power
■ Low Power ............................70µA (max) Operating
   ...................................... 10µA (max) Standby Mode
■ 16-Pin Plastic QSOP Package

TYPICAL APPLICATIONS
■ Thermal Protection For Intel “Deschutes”
   Pentium II™ and Other High Performance CPUs
   with Integrated On-Board Diode — No Sensor
   Mounting Problems!
■ Accurate Thermal Sensing From Any Si Junction
   Diode
■ Thermal Management in Electronic Systems:
   Computers, Network Equipment, Power Supplies