1
2
3
4
5
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8
A
B
C
D
8
7
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5
4
3
2
1
D
C
B
A
ISSUE
DRAWING NO.
23425
DRAWING TITLE
Drawn by:
DATE
Filename
ECO No.
DESCRIPTION OF CHANGE
J:\Change Control\ECO AGENDA\02 E000 L878 cap voltage correction\L878 3.3A.ddb - Documents\L878C3 3.3A.sch
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
DVD AV PCB - Reclocking
Circuit Diagram
L878C3
PG
7-Jan-2002
INITIALS
Date Printed
3
7
Sheet
of
Notes:
BCK_IN
ADIN
LRCK_IN
AD DAC L
LRCK_DAC_L
BCK_DAC_L
Re-clocking circuit for DAC signals
To DACs
SPDIF_IN
SPDIF_R
CK256FS_RCK
RE_CLOCKING
+5V
C39
100N 0805
C40
100N 0805
L2
7F004
+5V
C41
100N 0805
C42
100N 0805
L11
7F004
+5V
AD_DAC_R
LRCK_DAC_R
BCK_DAC_R
CLK
3
D
2
SD
4
CD
1
Q
5
Q
6
Z7A
74VHCT74 SM
CLK
11
D
12
SD
10
CD
13
Q
9
Q
8
Z7B
74VHCT74 SM
CLK
3
D
2
SD
4
CD
1
Q
5
Q
6
Z28A
74VHCT74 SM
CLK
3
D
2
SD
4
CD
1
Q 5
Q
6
Z8A
74VHCT74 SM
CLK
11
D
12
SD
10
CD
13
Q
9
Q
8
Z8B
74VHCT74 SM
CLK
11
D
12
SD
10
CD
13
Q
9
Q
8
Z28B
74VHCT74 SM
R58
100R 0805
VCC
14
GND
7
Z7C
74VHCT74 SM
Note that input signals are 3V, hence VHCT
VCC
14
GND
7
Z8C
74VHCT74 SM
C44
100N 0805
C43
100N 0805
L24
7F004
+5V
VCC
14
GND
7
Z28C
74VHCT74 SM
R55
330R 0805
R66
330R 0805
R56
330R 0805
R72
330R 0805
R57
330R 0805
R73
330R 0805
00_1136
PG
24/11/00 Issue 3 PCB with 8740 DACs
3.0
01_1000
PG
02/01/01 Change R9,R10 from 100R to 22R
3.1
01_1047
PG
15-03-01 Diodes changed from 3B22D to 3BS1D
3.2
PG
13/11/01 C155 changed to 100R
3.3
02_E000
PG
07/01/02 Admin change - cap voltages corrected on BOM
3.3A
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