f75363 Feature Integration Technology Inc., f75363 Datasheet - Page 5

• Manufacturer Part Number: f75363
• Description: ?1o C Accuracy Temperature Sensor Ic With Fan Speed Control
• Manufacturer: Feature Integration Technology Inc.

F75363
1.
2.
General Description
The F75363 is a temperature sensor IC with PWM duty cycle output which is specific designed for graphic
cards etc. An 11-bit analog-to-digital converter (ADC) was built inside F75363. The F75363 can monitor
temperature and fan speed which is important for the system to work stably and properly. This chip provides 1
remote temperature sensor and 1 local temperature sensor. The remote temperature sensor can be performed
by CPU/GPU thermal diode or transistor 2N3906. 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. As for fan speed control, the F75363 can use PWM duty
cycle output to automatically control fan speed. The fan speed control is related to temperature variation. There
is 8-step lookup table for users to program PWM duty cycle output to control fan speed according to the
temperature variation. The F75363 is in the package of 8-pin SOP and powered by 3.3V.
Features
Patented:
Provide 1 on-chip local and 1 remote temperature sensing
Accuarcy
User selectable multi-function pin for either PWM duty cycle output or THERM# signal output function
User selectable multi-function pin for either ALERT# output or tachometer input function
Automatic fan speed control with user programmable 8-step lookup table
Programmable alert queue and limited and setting points(alert threshold) for monitored items
2 wire SMBus interface and ALERT# output for SMBus alert
3VCC operation and in 8-SOP package
TWI235231, TWI263788
±1
±3
o
o
C accuarcy on remote channel (+60
C accuarcy on local channel(+0
o
C to +100
-1-
o
C to +126
o
C)
o
C)
F75363
July, 2007
V0.27P