MIC280-6YM6

Precision IttyBitty Thermal Supervisor

General Description

The MIC280 is a digital thermal supervisor capable of measuring its own internal temperature and that of a remote PN junction. The remote junction may be an inexpensive commodity transistor, e.g., 2N3906, or an embedded thermal diode such as found in Intel Pentium

.

II/III/IV CPUs, AMD Athlon* CPUs, and Xilinx Virtex* FPGA"s. A 2-wire SMBus* 2.0 compatible serial interface is provided for host communication. Remote temperature is measured with ±1°C accuracy and 9-bit to 12-bit resolution programmable. Independent high, low, and over-temperature thresholds are provided for each zone.

Features

•  Measures local and remote temperature

•  Highly accurate remote sensing

 ±1°C max., 60°C to 100°C

•  Superior noise immunity for reduced temperature guard

bands

•  9-bit to 12-bit temperature resolution for remote zone

•  Fault queues to further reduce nuisance tripping

•  Programmable high, low, and over-temperature thresh olds for each zone

•  SMBus 2 compatible serial interface including device timeout to prevent bus lockup

•  Voltage tolerant I/O’s

•  Open-drain interrupt output pin - supports SMBus Alert Response Address protocol

•  Low power shutdown mode

•  Locking of critical functions to insure failsafe operation

•  Failsafe response to diode faults

•  Enables ACPI compliant thermal management

•  3.0V to 3.6V power supply range

•  IttyBitty™ SOT23-6 package