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F75373S Datasheet(PDF) 12 Page - Feature Integration Technology Inc.

Part # F75373S
Description  Fintek Hardware Monitor IC Datasheet
Download  49 Pages
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Manufacturer  FINTEK [Feature Integration Technology Inc.]
Direct Link  http://www.fintek.com.tw/eng
Logo FINTEK - Feature Integration Technology Inc.

F75373S Datasheet(HTML) 12 Page - Feature Integration Technology Inc.

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Fintek
Feature Integration Technology Inc.
V0.25P
7
F75373
connected by a serial resistor with 10K Ohm, then connect to VREF (pin13).
5.3.2 Over Temperature Signal (OVT#)
The F75373S can provide two external thermal sensors to detect temperature. When monitored temperature exceeds the
over-temperature threshold value, OVT# will be asserted until the temperature goes below the hysteresis temperature.
THYST
To
OVT#
Figure 5-4
5.4 Fan
5.4.1 Fan speed count
Inputs are provided by the signals from fans equipped with tachometer outputs. The level of these signals should be set to TTL
level, and maximum input voltage cannot be over VCC. If the input signals from the tachometer outputs are over the VCC, the
external trimming circuit should be added to reduce the voltage to obtain the input specification. The normal circuit and
trimming circuits are shown as follows:
FAN Out
+12V
GND
Pull-up resister
4.7K Ohms
+12V
Fan Input
FANIN 1
F75373S
22K~30K
10K
FAN
Connector
FAN Out
+12V
GND
Pull-up resister < 1K
or totem-pole output
+12V
Fan Input
F75373S
> 1K
Figure 5-6 Fan with Tach Pull-Up to +12V, or
Totem-Pole Putput and Zener Clamp
3.3V Zener
Figure 5-5 Fan with Tach Pull-Up to +12V, or Totern-Pole
Output and Register Attenuator
FANIN 1


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