Bose T1 ToneMatch, Руководство по обслуживанию

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57
IC Diagrams
PIN DESCRIPTION
N O I T C N U F D N A E M A N L O B M Y S . O N N I P
A 3 , 2 , 1
0
to A
2
address inputs
4, 5 E
1
, E
2
enable inputs (active LOW)
E 6
3
enable input (active HIGH)
) V 0 ( d n u o r g D N G 8
15, 14, 13, 12, 11, 10, 9, 7 Y
0
to Y
7
outputs (active LOW)
V 6 1
CC
positive supply voltage
Pin configuration Logic symbol
handbook, halfpage
MLB312
A 0
A 1
A 2
1
2
3
15
13
11
7
9
10
12
14
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
4
5
6
E1
E2
E3
FUNCTION TABLE
Notes
1. H = HIGH voltage level
L = LOW voltage level
X = don’t care
S T U P T U O S T U P N I
E
1
E
2
E
3
A
0
A
1
A
2
Y
0
Y
1
Y
2
Y
3
Y
4
Y
5
Y
6
Y
7
H
X
X X
H
X X
X
L
X
X
X X
X
X X
X
X H
H
H H
H
H H
H
H H
H
H H
H
H H
H
H H
H
H H
H
H
L
L
L
L L
L
L
L H
H
H
H L
H
L
H
L
L
H
H
L
L
L
L L
H
H
H
H
L
H
H
H
H
L
H
H
H
H
L
H
H
H
H H
H
H
H H
H
H
H H
H
H
H
L
L
L
L L
L
L
L H
H
H
H L
H
L
H
L
L
H
H
H
H
H
H H
H
H
H H
H
H
H H
H
H
H H
H
H
H L
H
H
H
H
L
H
H
H
H
L
H
H
H
H
L
74HC138, 3-to-8 Line Decoder