Circuit Descriptions, Abbreviation List, and IC Data Sheets
9.
9.4
IC Data Sheets
This section shows the internal block diagrams and pin layouts
of ICs that are drawn as “black boxes” in the electrical diagrams
(with the exception of “memory” and “logic” ICs).
9.4.1
3-to-1 DVI/HDMI Switch, TMDS341A (U3)
Figure 9-1 Internal block diagram and pin configuration
PRE
VSADJ
Y4
Z4
Y3
Z3
Y2
Z2
Y1
Z1
S1
S2
S3
HPD_SINK
SCL_SINK
SDA_SINK
SDA3
SCL3
SDA2
SCL2
SDA1
SCL1
HPD3
HPD2
HPD1
B31
A31
B32
A32
B33
A33
B34
A34
B21
A21
B22
A22
B23
A23
B24
A24
Rx w/
EQ
Rx w/
EQ
Rx w/
EQ
Rx w/
EQ
Rx w/
EQ
Rx w/
EQ
Rx w/
EQ
Rx w/
EQ
Control Logic
3−to−1 MUX
TMDS
Drive
TMDS
Drive
TMDS
Drive
TMDS
Drive
Rx w/
EQ
Rx w/
EQ
Rx w/
EQ
Rx w/
EQ
V
CC
(3.3 V)
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
(3.3 V)
V
CC
(3.3 V)
A1
1
B1
1
A12
B12
A13
B13
A14
B14
R
INT
R
INT
R
INT
R
INT
R
INT
R
INT
R
INT
R
IN
T
R
IN
T
R
IN
T
R
IN
T
R
INT
OE
BLOCK DIAGRAM TMD
S3
41A
PIN CONFIGURATION
HPD2
SDA2
SCL2
GND
GND
B21
A21
B22
A22
GND
B23
A23
V
B24
A24
GND
HPD1
NC
O
E
HP
D3
SD
A
3
SC
L3
GN
D
B3
1
A3
1
B3
2
A
32
GN
D
B
3
3
A
3
3
B
3
4
A3
4
GN
D
N
C
HPD_SINK
SDA_SINK
SCL_SINK
GND
GND
Z1
Y1
Z2
Y2
GND
Z3
Y3
Z4
Y4
GND
S3
S2
S1
NC
P
R
E
V
GN
D
A
1
4
B
14
A
13
B1
3
A
1
2
B1
2
A1
1
B1
1
G
ND
S
CL
1
S
DA
1
CC
V
CC
V
CC
V
CC
V
CC
V
CC
C
C
V
C
C
V
CC
V
C
C
VSADJ
2
3
4
5
6
7
8
9
10 11 12 13
1
14 15 16 17 18 19 20
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
59 58 57 56 55
0
5
1
5
2
5
4
5
0
6
53
49 48 47 46 45 44 43 42 41
V
C
C
V
C
C
NC
GN
D
H_17490_027.ep
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