1 2 3 4 5 6 7 8
A
B
C
D
87654321
D
C
B
A
ISSUE
DRAWING NO.
23425
DRAWING TITLE
Drawn by:
DATE
Filename
ECO No. DESCRIPTION OF CHANGE
J:\FILES\L-ELECT\PCB complete packages\l900s\l912 New 2000 DAC\L912_2.0\L912_2.0.DDB - L912C9_2.0.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
9 CD DAC Re-clocking & PMD-200
Circuit Diagram
L912CT
CW
28-Jun-2001
INITIALS
Date Printed
8 8Sheet of
Notes:
SER CLK
SER DIN
SER_CH
BCKO
WCKO
DOL
DOR
GAIN
1 2
IC300A
74HCU04 SM
3 4
IC300B
74HCU04 SM
5 6
IC300C
74HCU04 SM
CLK
3
D
2
SD
4
CD
1
Q
5
Q
6
IC402A
74VHC74MX SM
CLK
11
D
12
SD
10
CD
13
Q
9
Q
8
IC402B
74VHC74MX SM
VCC
14
GND
7
IC401C
74VHC74MX SM
CLK
11
D
12
SD
10
CD
13
Q
9
Q
8
IC401B
74VHC74MX SM
CLK
3
D
2
SD
4
CD
1
Q
5
Q
6
IC401A
74VHC74MX SM
C400
100P SM
VCC
14
GND
7
IC402C
74VHC74MX SM
R400
1K0 SM
RA2
1
RA3
2
RTCC
3
MCLR
4
VSS
5
RB0
6
RB1
7
RB2
8
RB3
9
RB4
10
RB5
11
RB6
12
RB7
13
VDD
14
OSC2
15
OSC1
16
RA0
17
RA1
18
IC406
PIC16C54XT
+
C401
10U EL
+
C422
100U EL
CLK
3
D
2
SD
4
CD
1
Q
5
Q
6
IC403A
74VHC74MX SM
CLK
11
D
12
SD
10
CD
13
Q
9
Q
8
IC403B
74VHC74MX SM
VCC
14
GND
7
IC403C
74VHC74MX SM
X400
CST4.00
C407
100N SM
C409
100N SM
C413
100N SM
R409
10K SM
R406
10K SM
R405
10K SM
R404
22K SM
R407
10K SM
R408
10K SM
R412
10K SM
C411
100N SM
SER_CLK
SER_DIN
SER_CH
CLK17M_3V_LATCH
CLK17M 3V PMD200
HDCDLED
L403
7F004
L402
7F004
L400
7F004
C410
100N SM
C412
100N SM
C414
100N SM
+3V3 +3V3 +3V3
L401
7F004
+3V3
+3V3
MUTE
DEEMPH
b0
b1
b2
b3
b4
b5
b6
b7
1
2
3
4
5
6
7
8 9
10
11
12
13
14
15
16
On
SW400
SW DIL 8WAY SM A1601
R415
10K SM
R416
10K SM
R417
10K SM
R420
10K SM
R418
10K SM
R421
10K SM
R419
10K SM
R422
10K SM
+3V3
b0
b1
b2
b3
b4
b5
b6
b7
SET DITHER
GO
R401
0R0 SM
RESET
RESET
C421
10N SM
C420
10N SM
+3V3+3V3
C127 to C131 to be placed as close to pins 31 and 33 of Z400 as possible
DSP3V3
+3V3
+3V3
+3V3
+3V3
+3V3
+3V3
BCKI
7
DIN
20
LRCI
5
BCKO
6
DOUT/DOL
14
DOR
16
WCKO
4
ZERO
94
HDCD
91
GAIN
96
GNDp
33
GNDq
12
GNDq
36
GNDq
65
GNDq
88
GNDa
49
GNDa
56
GNDa
64
GNDa
72
GNDd
80
GNDc
43
GNDs
9
GNDs
22
GNDs
93
GNDg(HCKT)
10
GNDg
38
GNDg
75
GNDg
76
GNDg
77
GNDg
78
GNDg
81
GNDg
82
GNDg
83
GNDg
84
VCCp
31
VCCqc
11
VCCqc
37
VCCqc
66
VCCqc
87
VCCqh
15
VCCqh
35
VCCqh
61
VCCqh
89
VCCa
48
VCCa
55
VCCa
63
VCCa
71
VCCd
79
VCCc
42
VCCs
8
VCCs
21
VCCs
92
VCCg
95
DEEMP
19
SMUTE
13
HMUTE
17
MODEA
3
MODEB
2
MODED
1
RESET
29
PINIT
28
PCAP
32
EXTAL
34
I2C/SPI
18
MOSI/HA0
24
SS/HA2
23
MISO/SDA
25
SCK/SCL
26
HREQ
27
IC400
PMD200
R425
10K SM
D11
BAS16W SM
C112
10N 0805
C106
10N 0805
C105
10N 0805
C103
10N 0805
C102
10N 0805
C101
10N 0805
C99
10N 0805
C94
10N 0805
C90
10N 0805
C87
10N 0805
C86
10N 0805
C83
10N 0805
C82
10N 0805
C80
10N 0805
C79
10N 0805
C77
10N 0805
C76
10N 0805
C74
10N 0805
C113
10N 0805
ONE CAPACITOR PER VCC PIN
C131
100N 0805
C130
100N 0805
C129
100N 0805
C128
100N 0805
C127
100N 0805
TR31
DTRANN SM
TR32
BC856B
R56
1K0 SM
R57
1K0 SM
R60
220R SM
+3V3
HDCD
HDCDLED
HDCD
BCKO
DOL
DOR
WCKO
DEEMPH
L25
7F004
L26
7F004
C81
10N 0805
01_1078 CW 1-5-01 Production release 1.0
01_1084 1.1CW 30-4-01 Listening component changes
CW 9-6-01 2.0
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