HCF4520BEY 查看數據表（PDF） - STMicroelectronics
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HCF4520BEY Datasheet PDF : 12 Pages
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HCF4520B
IINPUT EQUIVALENT CIRCUIT
FUNCTIONAL DIAGRAM
PIN DESCRIPTION
PIN No
1
2
7
3, 4, 5, 6
9
10
15
11,12,13,14
8
16
SYMBOL NAME AND FUNCTION
CLOCK A Clock A input
ENABLE A Enable A Input
RESET A Reset A Input
Q1A to Q4A Data Outputs
CLOCK B Clock B input
ENABLE B Enable B Input
RESET B Reset B Input
Q1B to Q4B Data Outputs
VSS
Negative Supply Voltage
VDD
Positive Supply Voltage
TRUTH TABLE
CLOCK
L
X
H
X
X : Don’t Care
ENABLE
H
X
L
X
RESET
L
L
L
L
L
L
H
ACTION
INCREMENT COUNTER
INCREMENT COUNTER
NO CHANGE
NO CHANGE
NO CHANGE
NO CHANGE
Q1 THRU Q4 = 0
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