Ic Block Diagram （Icブロック図 - Yamaha O1V 96 Service Manual

IC BLOCK DIAGRAM
TC74VHC00F (XT229A00)
MAIN: IC138
Quad 2 Input NAND
1A
1B
1Y
2A
2B
2Y
Vss
TC74VHC14F-EL (XW876A00)
ADA: IC005
Hex Inverter
1A
1Y
2A
2Y
3A
3Y
GND
74VHC138SJX (XY873A00)
MAIN: IC707, 708, 714
3 to 8 Demultiplexer
Select
C
G2A
Enable
G2B
G1
Output
Y7
GND
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VDD
1 14
4B
2 13
4A
3 12
4Y
4 11
3B
5 10
3A
6 9
3Y
7 8
1
14
VDD
2 13
6A
3 12
6Y
4 11
5A
5
10
5Y
6
9
4A
7 8
4Y
1
A 16 Vcc
A
2
B Y0 15
B YO
3
C Y1 14
Y1
4
G2A Y2 13 Y2
Output
5 12
G2B Y3 Y3
6
G1 Y4 11
Y4
7
Y7 Y5 10 Y5
Y6
8
9 Y6
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（IC ブロック図）
74VHC04SJX (XY871A00)
MAIN: IC131, 453
SN74HCU04NSR (XW842A00)
ADA: IC007
Hex Inverter
1
1A 14
2
13
1Y
3
12
2A
4
2Y 11
5 10
3A
6
9
3Y
7
Vss 8
TC74VHC74F-EL (XW875A00)
MAIN: IC024, 307, 455
Dual D-Type Flip-Flop
1
1CLR 14
2 13
1D D
D
3 12
1CK CK
4
1PR 11
PR CK
5
Q 10
1Q
PR
6
9
Q
1Q Q
GND 7 8
Q
INPUTS OUTPUTS
PR CLR CLK D Q
L H X X H
H L X X L
L L X X H
H H f H H
H H f L L
H H L X Q
O
74VHC157SJX (XY870A00)
MAIN: IC402, 403
Quad 2 to 1 Multiplexer
1
SELECT 16
2
1A G 15
1A
3
1B 4A 14
1B
4
1Y 1Y 4B 13
5 2A 4Y 12
2A
6
2B 3A 11
2B
7
2Y 2Y 3B 10
8
GND 9
74VHC08SJX (XY872A00)
MAIN: IC014, 015, 503
Quad 2 Input AND
1A
1
VDD
1B
2
6A
1Y
3
6Y
2A
4
5A
2B
5
5Y
2Y
6
4A
VSS
7
4Y
HD74HC123AP (IR012310)
DCA: IC350
Dual Retriggerable Signale Shot
1A
1
VCC
1B
2
2CLR
1
3
2D
1Q
4
2CK
2Q
5
2PR
2 Cext
6
2Q
2 Rext / Cext
7
2Q
GND
8
Q
L
H
H
L
H
Q
O
TC74VHC244F (XT800A00)
ADA: IC006
Octal 3-State Bus Buffer
1G
1
Vcc
2
STROBE 1A1
3
4A
2Y4
4B 1A2
4
4Y 5
2Y3
3A 1A3
6
3B
2Y2 7
3Y
8
1A4
2Y1 9
(GND) Vss
10
01V96
VDD
14
4B
13
4A
12
4Y
11
3B
10
3A
9
3Y
8
Vcc
16
1 Rext / Cext
15
Cext
CLR 14
1Q
Q 13
Q
2Q
12
Q Q
CLR CLR
11
2B
10
9 2A
VDD (Vcc)
20
2G
19
1Y1
18
2A4
17
1Y2
16
2A3
15
1Y3
14
2A2
13
1Y4
12
2A1
11
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