W83L786NR Datasheet, PDF (18/50 Pages) Winbond – H/W Monitoring IC

W83L786NR/ W83L786NG
DIVISOR
1
2 (default)
4
8
16
32
64
128
NOMINAL RPM
8800
4400
2200
1100
550
275
137
68
TIME PER
REVOLUTION
COUNTS
6.82 ms
153
13.64 ms
153
27.27 ms
153
54.54 ms
153
109.08 ms
153
218.16 ms
153
436.32 ms
153
872.64 ms
153
Table 2
70% RPM
6160
3080
1540
770
385
192
96
48
TIME FOR 70%
9.74 ms
19.48 ms
38.96 ms
77.92 ms
155.84 ms
311.68 ms
623.36 ms
1246.72 ms
+12V
+12V
FAN Out
GND
Pull-up resister
4.7K Ohms
+12V
22K~30K
Fan Input
Pin 8
Pin 9
10K _W83L786NR
+12V
FAN Out
GND
FAN
Connector
Pull-up resister < 1K
or totem-pole output
> 1K
Fan Input
Pin 8
Pin 9
3.3V Zener
W83L786NR
Figure 7-1. Fan with Tach Pull-Up to +12V, or Totern-Pole
Output and Register Attenuator
Figure 7-2. Fan with Tach Pull-Up to +12V, or
Totem-Pole Putput and Zener Clamp
+5V
+5V
FAN Out
GND
Pull-up resister
4.7K Ohms
1K~2.7K
Fan Input
Pin 8
Pin 9
10K _W83L786NR
Figure 7-3. Fan with Tach Pull-Up to +5V, or Totern-Pole
Output and Register Attenuator
+5V
+5V
FAN Out
GND
FAN
Connector
Pull-up resister < 1K
or totem-pole output
> 1K
Fan Input
Pin 8
Pin 9
3.3V Zener
W83L786NR
Figure 7-4. Fan with Tach Pull-Up to +5V, or
Totem-Pole Putput and Zener Clamp
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Publication Release Date: March 31, 2006
Revision 0.9