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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\L878C4 3.3A.sch
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
DVD AV PCB - Clocks
Circuit Diagram
L878C4
PG
7-Jan-2002
INITIALS
Date Printed
4
7
Sheet
of
Notes:
10
11
Z12E
74HCU04 SM
14
7
Z12G
74HCU04 SM
CLK
3
D
2
SD
4
CD
1
Q
5
Q 6
Z10A
74VHC74MX SM
VCC
14
GND
7
Z10C
74VHC74MX SM
+5V_CLOCK1
FSEL0
FSEL1
Audio clock:
FSEL1. 0
Frequency
sample rate
0
1
2
3
11 2896MHz
12 288MHz
22 5792MHz
24 576MHz
44.1K x 256
48K x 256
88 2 x 256 (or 176.4K x 128)
96K x 256 (or 192K x 128)
CK256FS_DAC_L
CK256FS_DSP
CK256FS_EXT
To DACs
To DSP board
To 2nd DAC board
+5V_CLOCK2
CK256FS_RCK
To re-clocking
Divide by 2
CLOCKS
C45
100N 0805
Use +5V_CLOCK1 or +5V_CLOCK2?
L12
7F004
L13
7F004
L14
7F004
C46
100N 0805
C47
100N 0805
+5V_CLOCK2
C48
100N 0805
C49
100N 0805
+5V_CLOCK2
CK256FS_DAC_R
C54
100N 0805
C55
100N 0805
+5V_CLOCK1
8
9
Z12D
74HCU04 SM
5
6
Z12C
74HCU04 SM
1
2
Z12A
74HCU04 SM
Q2
BFS17H
L22
10UH SM
C56
100N 0805
C57
100N 0805
3
4
Z12B
74HCU04 SM
Q3
BFS17H
L23
10UH SM
C58
100N 0805
+5V_CLOCK1
22.5792MHz oscillator
24 576MHz oscillator
12
13
Z12F
74HCU04 SM
2
4
5
3
Z27
74AHC1GU04 SM
+5V_CLOCK1 or +5V_CLOCK2?
L15
7F004
C59
100N 0805
C60
100N 0805
+5V_CLOCK2
2
3
1
Z21A
74VHC125 SM
12
11
13
Z21D
74VHC125 SM
9
8
10
Z21C
74VHC125 SM
5
6
4
Z21B
74VHC125 SM
14
7
Z21E
74VHC125 SM
2
3
1
Z14A
74VHC125 SM
5
6
4
Z14B
74VHC125 SM
14
7
Z14E
74VHC125 SM
R59
100R 0805
R61
100R 0805
CLK
11
D
12
SD
10
CD
13
Q
9
Q 8
Z10B
74VHC74MX SM
R33
10K 0805
R40
10K 0805
R80
100R 0805
R75
100R 0805
R114
680R 0805
R121
680R 0805
R14
330R 0805
12
11
13
Z14D
74VHC125 SM
9
8
10
Z14C
74VHC125 SM
R79
100R 0805
X2
24 576MHZ
X1
22.5792MHZ
R110
22K 0805
R111
22K 0805
R63
33R 0805
R64
33R 0805
R67
100R 0805
R62
100R 0805
R74
33R 0805
C136
220P NPO 0805
C137
220P NPO 0805
C138
100P NPO 0805
C140
100P NPO 0805
C139
100P NPO 0805
C126
56P NPO 0805
C127
47P NPO 0805
C77
22P NPO 0805
C80
22P NPO 0805
C156
22P NPO 0805
C157
22P NPO 0805
C158
22P NPO 0805
NF
NF
NF
NF
NF
R78
100R 0805
R120
680R 0805
R77
4M7 0805
00_1136
PG
24/11/00 Issue 3 PCB with 8740 DACs
3.0
On issue 3 R74 changed to 33R
Rev 2.1/3 0: Changed C126 from 47pF to 56pF
To slow audio clock down slightly
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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