The MAX6581 precision multichannel temperature sensor monitors its own temperature and the temperatures of up to seven external diode-connected transistors. All temperature channels have programmable alert and overtemperature thresholds. When the measured temperature of a channel crosses the respective threshold, a status bit is set in one of the status registers. Two open-drain alarm outputs (active-low ALERT and active-low OVERT) assert corresponding to these bits in the status register(s).
Resistance cancellation is available for all channels and compensates for high series resistance in circuit-board traces and thermal diodes.
The 2-wire serial interface accepts SMBus™ protocols (write byte, read byte, send byte, and receive byte) for reading the temperature data and programming the alarm thresholds.
The MAX6581 is specified for an operating temperature range of -40°C to +125°C and is available in a 24-pin, 4mm x 4mm thin QFN package with an exposed pad.
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