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IC BLOCK DIAGRAM AND DESCRIPTION
TC94A46FG(Function Switch)
PIN NO. SYMBOL
1,3,
5,7,
9,11,
13,15,
17,19,
21,23,
25,27,
29,36,
38,40,
42,44,
46,48,
50,52,
54,56,
58,60,
62,64
66,68,
70,72,
73
TERMINAL
74
S01
71
75
S02
69
78
S03
67
80
S04
65
2
S05
63
4
S06
61
Input/
6
Output
S07
59
Terminals
8
S08
57
10
S09
55
12
S10
53
14
S11
51
16
S12
49
18
S13
47
20
S14
45
22
COM1
43
Output/
24
COM2
Input
41
Terminals
26
COM3
39
Vss
Negative power
28
V
31
Positive power
DD
37
Digital ground
GND
CS1
30
Chip select
cord
change-over
terminal
35
CS2
CK
Clock input
32
33
DATA
Data input
STB
34
Strobe input
No connection
NC
FUNCTION/OPERATION
Analog Switch Circuit
Power supply terminal.
Input to change a chip select code.
Chip select code
Terminal
CS2
CS1
CS2
CS1
C1
C2
C3
L
L
0
0
1
0
1
H
L
1
0
1
0
1
L
H
0
1
1
1
0
H
H
1
1
1
1
0
Clock input to transfer a data.
Analog switch control data input.
Strobe input to write a data.
TX-NR1000
C4
0
0
0
0
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