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Marantz SR8001 - Page 122

Marantz SR8001
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156
IC36 : TC74VCX157FT
IC38 : TC74VCX157FT
Pin Assignment
(top view)
IEC Logic Symbol
Truth Table
Inputs Outputs
ST SELECT A B Y
H X X X L
L L L X L
L L H X H
L H X L L
L H X H H
X: Don’t care
V
CC
16
ST
4A
4B
4Y
3A
15
14
13
12
11
10
SELECT 1
2
3
4
5
6
7
1A
1B
1Y
2A
2B
2Y 3B
8GND 9 3Y
(13)
(15)
(11)
(1)
(3)
(2)
(6)
(5)
1Y
3A
SELECT
1B
1A
2B
2A
ST
3B
4A
4B
(10)
(14)
EN
G1
1
1 MUX
(9)
(4)
(7)
(12)
2Y
3Y
4Y
IC38 : TC74VHC157FT

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