F75386
1. 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.
Through the BIOS or application software, the users can read all the monitored parameters of
system all the time. And a pop-up warning can be also activated when the monitored item was out of
the proper/pre-setting range. The F75386 is in the green package of 8-pin MSOP/SOP and powered
by 3.3V.
2. Features
Provide 1 on-chip local and 2 remote temperature sensing
9
±1 oC accuarcy on remote channel(+60 oC to +126 oC)
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
Patented: TW235231, TWI263778
-1-
F75386
July, 2007
V0.27P
FINTEK [ FEATURE INTEGRATION TECHNOLOGY INC. ]
