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W83781D Datasheet(PDF) 52 Page - Winbond

Part # W83781D
Description  H/W MONITORING IC
Download  54 Pages
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Manufacturer  WINBOND [Winbond]
Direct Link  http://www.winbond.com
Logo WINBOND - Winbond

W83781D Datasheet(HTML) 52 Page - Winbond

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W83781D/W83781G
Publication Release Date: April 14, 2005
- 48 -
Revision 2.0
0.6
APPLICATION OF W83781D
WINBOND ELECTRONICS CORP.
B
22
Wednesday, February 24, 1999
Title
Size
Document Number
Rev
Date:
Sheet
of
+12V
+12V
VCC
5VSB
BAT
These two
inveters
consume
CaseOpen
Switch
Q
Q'
open
1
0
close
0
1
open
open
01
10
normal state
after reset
ps. 'Switch Open' means 'Case Close'
Q
Q'
FanBlock
CaseBlock
VRTC
VRTC
On-board RTC Power
Switch Circuit
if W83781D does not reset
(let Q=0), then stable
SpeakerBlock
R19
4.7K
R20
10K
R21
2.2M
S1
CASEOPEN SW
U2A
74HC14
1
2
U2B
74HC14
3
4
C17
1000pF
10% 50V
R22
4.7K
JP1
HEADER 3
CPU FAN
Connecter
1
2
3
JP2
HEADER 3
MB FAN
Connecter
1
2
3
D1
DIODE
D2
DIODE
C18
10uF
Q1
NPN
R23
4.7K
LS1
SPEAKER
R24
100
R27
R
10K
R29
R
10K
R26
R
20-27K
D3
DIODE
R28
R
20-27K
D4
DIODE
FAN2IN
FAN1IN
FAN1OUT
CASEOPEN
BEEP/GPO#


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