GENERAL DESCRIPTION
The ADT7470¹ controller is a multichannel temperature sensor and PWM fan controller and fan speed monitor for systems requiring active cooling. It is designed to interface directly to an I2C® bus. The ADT7470 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. 

FEATURES
   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
   Limit comparison of all monitored values
   Supports fast I2C standard (400 kHz max)
   Meets SMBus 2.0 electrical specifications(fully SMBus 1.1-compliant)
   
APPLICATIONS
   Servers
   Networking and telecommunications equipment
   Desktops