CD74HC393 查看數據表（PDF） - Harris Semiconductor
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CD74HC393 Datasheet PDF : 7 Pages
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Functional Diagram
CD74HC393, CD74HCT393
1
1CP
2
1MR
13
2CP
12
2MR
BINARY
COUNTER
BINARY
COUNTER
3
1Q0
4
1Q1
5
1Q2
6
1Q3
11
2Q0
10
2Q1
9
2Q2
8
2Q3
GND = 7
VCC = 14
TRUTH TABLE
OUTPUTS
CP COUNT
Q0
Q1
Q2
Q3
0
L
L
L
L
1
H
L
L
L
2
L
H
L
L
3
H
H
L
L
4
L
L
H
L
5
H
L
H
L
6
L
H
H
L
7
H
H
H
L
8
L
L
L
H
9
H
L
L
H
10
L
H
L
H
11
H
H
L
H
12
L
L
H
H
13
H
L
H
H
14
L
H
H
H
15
H
H
H
H
CP COUNT
MR
OUTPUT
↑
L
No Change
↓
L
Count
X
H
LLLL
NOTE: H = High Voltage Level, L = Low Voltage Level, X = Don’t Care,
↑ = Transition from Low to High Level, ↓ = Transition from High to Low.
2
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