General Description
The F75386 is a temperature sensor IC with fan speed monitoring and controlling function which is specific designed for notebook etc. An 11-bit analog-to-digital converter (ADC) was built inside F75386. The F75386 can provide 2 remote temperature sensor and 1 local temperature sensor. The remote temperature sensor can be performed by CPU/GPU thermal diode or transistor 2N3906. The F75386 can also provide alert signals for system protection which is optional with fan speed monitoring and controlling. The users can set up the upper and lower limits (alarm thresholds) of all monitored parameters and this chip will issue warning messages for system protection if there is something wrong with monitored items. As for fan speed control, the fan speed will be related to temperature variations. The F75386 can use PWM duty cycle output to automatically control fan speed. There are 8 steps PWM duty cycle output for users to program according to the temperature variations.

FEATUREs
✦ Provide 1 on-chip local and 2 remote temperature sensing
   ✓ ±1 °C accuarcy on remote channel(+60 °C to +126 °C)
✦ Integrated fan speed monitoring function and PWM duty cycle output for automatic fan speed control
✦ User selectable multi-function pin for either tachometer input or ALERT# output function
✦ User selectable multi-function pin for either PWM duty cycle output or THERM# output function
✦ ALERT# output for SMBus alert
✦ THERM# output for over temperature alert or for system shut down
✦ Programmable THERM# limits and THERM# hysteresis
✦ Programmable alert queue and limited and setting points(alert threshold) for monitored items
✦ 2 wire SMBus interface
✦ 3VCC operation and in 8-MSOP/SOP green package