Thermostat ±1°C Open Drain SMD 6-Pin SOT-23

The MIC280 is a digita ltherma lsupervisor capable of measuring its own internal temperature and that of a remote PN junc-tion. The remote junction may be an inexpensive commoditytransistor, e.g., 2N3906, or an embedded thermal diode suchas found in Intel Pentium* II/III/IV CPUs, AMD Athlon* CPUs,and Xilinx Virtex* FPGA"s. A 2-wire SMBus* 2.0 compatibleserial interface is provided for host communication. Remotetemperature is measured with ±1°C accuracy and 9-bit to12-bit resolution (programmable). Independent high, low, andover-temperature thresholds are provided for each zone.The advanced integratingA/D converter and analog front-endreduce errors due to noise for maximum accuracy and mini-mum guardbanding.The interrupt output signals temperatureevents to the host, including data-ready and diode faults.Critical device settings can be locked to prevent changes andinsure failsafe operation. The clock, data, and interrupt pinsare 5V-tolerant regardless of the value of VDD. They will notclamp the bus lines low even if the device is powered down.Superior accuracy, failsafe operation, and small size makethe MIC280 an excellent choice for the most demandingthermal management applications.

• 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 devicetimeout to prevent bus lockup
• Voltage tolerant I/O’s
• Open-drain interrupt output pin - supports SMBus AlertResponse 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