Feature Integration Technology Inc.
Fintek
F75375S/F75375SG
1 General Description
F75375S is a system hardware monitoring and automatic fan speed controlling IC specific designed for
graphic cards and mini PC etc. The F75375S can monitor several critical hardware parameters of the system,
including voltages, temperatures and fan speeds which are very important for the system to work stably and
properly.
An 8-bit analog-to-digital converter (ADC) was built inside F75375S. The chip can monitor up to 4 analog
voltage inputs, 2 fan tachometer inputs and 2 remote temperature sensors. The remote temperature sensor
is suggested to be performed by thermistor, transistor 2N3906 and CPU thermal diode. The F75375S can
provide automatic fan speed control so that the system can operate at the minimum acoustic noise. This chip
support not only PWM duty mode but also linear mode for fan speed control. Internal oscillator was built in
this chip and user can use external clock input if users need accurate fan speed count. Also the users can
set up the upper and lower limits (alarm thresholds) of all monitored parameters and this chip can also issue
warning messages for system protection when there is something wrong with monitored items.
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 application software could be Fintek's application software MyGuardTM or other management
application software. The F75375S is in the package of 150mil 16-pin SOP and powered by 3.3V.
2 Feature
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4 voltage inputs
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Monitor up to 2 remote temperature sensor
-- from remote thermistor / transistor / thermal diode (BJT diode-connected)
Up to 2 fan speed monitoring input and 2 automatic fan speed control
-- Support both linear and PWM fan speed control (PWMOUT 25KHz support 4 pin fan)
-- 3 flexible fan speed controlled modes : Manual mode, Speed mode and Temperature mode.
Programmable limited and setting points(alert threshold) for all monitored items
Issue FAN_FAULT# or VOLT_FAULT# or OVT# or SMI# signal to activate system protection
Can use external clock for accurate fan speed count
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Up to 4 general purpose I/O support
2-wire I2C interface
VCC3V operation and 16SOP package(150mil)
Noted: Patented TW207103 TW207104 TW220442 US6788131 B1
1
July 2007
V0.26P
FINTEK [ FEATURE INTEGRATION TECHNOLOGY INC. ]
