f75387 Feature Integration Technology Inc., f75387 Datasheet - Page 6

• Manufacturer Part Number: f75387
• Description: ?1o C Accuracy H/w Monitor Ic With Automatic Fan Speed Control
• Manufacturer: Feature Integration Technology Inc.

1. General Description
2. Features
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 F75387 is in the package of 16-pin SOP/SSOP and powered by 3.3V
F75387 is a system hardware monitoring and automatic fan speed controlling IC specific designed
for graphic cards and PC etc. The F75387 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 11-bit analog-to-digital converter (ADC) was built inside F75387. The chip can monitor up to 4
analog voltage inputs, 2 fan tachometer inputs and 3 temperature inputs (2 remote and 1 local
sensor). The remote temperature sensor can be performed by thermistor, transistor 2N3906 and
CPU/GPU thermal diode. The F75387 can provide automatic fan speed control so that the system
can operate at the minimum acoustic noise. This chip supports not only PWM duty mode
(PWMOUT) but also linear mode (DACOUT 0 ~ 3.3V) 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
the F75387 can also issue warning messages for system protection when there is something
wrong with monitored items.
Noted: Patented TW207103 TW207104 TW220442 US6788131 B1 TW235231 TWI263788
Through the BIOS or application software, the users can read all the monitored parameters of
4 voltage inputs
Provide 2 remote and 1 on-chip local temperature sensor
Up to 2 fan speed monitoring inputs and 2 automatic fan speed control
Power on fan speed configuration
Provide up to 4 system protection signals
Programmable limited and setting points(alert threshold) for all monitored items
2-wire SMBus interface
V
CC
3V operation and 16-SOP/SSOP package(150mil)
100% or 60% PWM duty cycle output on initial
3.3V or 1.98V DAC linear voltage output on initial
OVT#, SMI#, FAN_FAULT#, VOLT_FAULT# signals
4
July, 2007
F75387
0.27P