41
01V96
IC BLOCK DIAGRAM
TC74VHC00F (XT229A00)
MAIN: IC138
Quad 2 Input NAND
74VHC04SJX (XY871A00)
MAIN: IC131, 453
SN74HCU04NSR (XW842A00)
ADA: IC007
Hex Inverter
74VHC08SJX (XY872A00)
MAIN: IC014, 015, 503
Quad 2 Input AND
TC74VHC14F-EL (XW876A00)
ADA: IC005
Hex Inverter
TC74VHC74F-EL (XW875A00)
MAIN: IC024, 307, 455
Dual D-Type Flip-Flop
HD74HC123AP (IR012310)
DCA: IC350
Dual Retriggerable Signale Shot
74VHC138SJX (XY873A00)
MAIN: IC707, 708, 714
3 to 8 Demultiplexer
1
2
3
1A
1Y
4
2A
5
2B
6
2Y
7
Vss
1B
14
13
12
VDD
4A
11
4Y
10
3B
9
3A
8
3Y
4B
1
2
3
1A
1Y
4
2A
5
2B
6
2Y
7
VSS
1B
14
13
12
VDD
4A
11
4Y
10
3B
9
3A
8
3Y
4B
1
2
3
4
5
6
7
1A
1Y
2A
2Y
3A
3Y
Vss
14
13
12
11
10
9
8
VDD
6A
6Y
5A
5Y
4A
4Y
1
2
3
4
5
6
7
1A
1Y
2A
2Y
3A
3Y
GND
14
13
12
11
10
9
8
VDD
6A
6Y
5A
5Y
4A
4Y
INPUTS
OUTPUTS
PR
CLR
CLK
D
Q
Q
L
H
H
L
H
Q
O
H
L
H
H
L
Q
O
X
X
X
H
L
X
X
X
X
f
f
L
H
L
L
H
H
H
L
H
L
H
H
H
1
2
3
4
5
6
7
1CLR
1D
1CK
1PR
1Q
1Q
GND
14
13
12
11
10
9
8
VCC
2CLR
CLR
2D
D
2CK
CK
2PR
PR
2Q
2Q
Q
Q
CLR
D
CK
PR
Q
Q
1A
1B
1
1Q
2Q
2 Cext
2 Rext / Cext
GND
1
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
Vcc
1 Rext / Cext
Cext
1Q
2Q
CLR
2B
2A
CLR
Q
Q
Q
Q
CLR
1
2
3
4
5
6
7
A
A
Select
Enable
Output
Output
B
B
C
C
G2A
G2A
G2B
G2B
G1
G1
Y7
Y7
Y5
Y4
Y3
Y2
Y1
Y0
Y6
16
15
14
13
12
11
10
Vcc
YO
Y1
Y2
Y3
Y4
Y5
8
GND
9
Y6
74VHC157SJX (XY870A00)
MAIN: IC402, 403
Quad 2 to 1 Multiplexer
1
2
3
4
5
6
7
SELECT
1A
1A
1B
1B
1Y
1Y
2A
2A
2B
2B
2Y
2Y
16
15
14
13
12
11
10
Vcc
STROBE
G
4A
S3
Y
4A
4B
4B
4Y
4Y
3A
3A
3B
3B
8
GND
9
3Y
TC74VHC244F (XT800A00)
ADA: IC006
Octal 3-State Bus Buffer
1G
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
VDD (Vcc)
2G
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
(GND) Vss
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