W83781D Nuvoton Technology Corporation of America, W83781D Datasheet - Page 52

• Manufacturer Part Number: W83781D
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83781D

• Lead Free Status / Rohs Status: Supplier Unconfirmed

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