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XV-D9000
TC74HC74AF-W(IC181):Dual D-type flip flop preset and clear
TC74VHC74FT-X (IC726,IC725)
1.Pin layout
1CLR
1
1D
2
CK
Q
1CK
3
1PR
4
1Q
5
CK
1Q
6
(TOP VIEW)
Q
GND
7
TC74VHC03F-X(IC182):2-input nand gate
1.Pin layout
1A
1
1B
2
1Y
3
2A
4
2B
5
2Y
6
GND
7
(TOP VIEW)
TC74VHC125FT-X (IC557,IC558,IC559,IC361,IC362) : Buffer
1. Pin layout & block diagram
1G 1
1A 2
1Y 3
2G 4
2A 5
2Y 6
GND 7
1-48
14
VCC
13
2CLR
D
Q
12
2D
11
2CK
10
2PR
D
9
2Q
Q
8
2Q
14
VCC
13
4B
12
4A
11
4Y
10
3B
9
3A
8
3Y
14 Vcc
13 4G
12 4A
11 4Y
10 3G
9 3A
8 3Y
2.Truth table
INPUTS
CLR
PR
D
CK
L
H
X
X
H
L
X
X
L
L
X
X
H
H
L
H
H
H
H
H
X
X : Don't Care
2.Truth table
A
L
L
H
H
L : High impedance
2. Truth table
INPUTS
G
A
H
X
L
L
L
H
X: Don't care
Z:High impedance
OUTPUTS
FUNCTION
Q
Q
L
H
CLEAR
H
L
PRESET
H
H
L
H
H
L
Qn
Qn
NO CHANGE
B
Y
L
Z
H
Z
L
Z
H
L
OUTPUTS
Y
Z
L
H
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