The ADT7470ARQZ is a Temperature Sensor Hub and Fan Controller for systems requiring active cooling. It is designed to interface directly to an I2C? bus. It can monitor up to 10 daisy-chained TMP05 temperature sensors. It can also monitor and control the speed of four fans, in automatic or in manual control loops. A FULL_SPEED input is provided to allow the fans to be blasted to maximum speed, via external hardware control, under extreme thermal conditions or on system start-up. An SMBALERT interrupt communicates error conditions such as fan under speed and over-temperature measurements to the system service processor. Individual error conditions can then be read from status registers over the I2C bus.
Monitors up to 10 remote temperature sensors
Monitors and controls speed of up to 4 fans independently
PWM outputs drive each fan under software control
FULL_SPEED input allows fans to be blasted to maximum speed by external hardware
SMBALERT interrupt signals failures to system controller
Three-state ADDR pin allows up to 3 devices on a single bus
Temperature decoder interprets TMP05 temperature sensors and communicates values over I2C bus
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