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HCF4518B Datasheet(PDF) 2 Page - STMicroelectronics

Part No. HCF4518B
Description  DUAL BCD UP COUNTER
Download  11 Pages
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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HCF4518B Datasheet(HTML) 2 Page - STMicroelectronics

 
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HCF4518B
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IINPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
FUNCTIONAL DIAGRAM
TRUTH TABLE
X : Don’t Care
PIN No
SYMBOL
NAME AND FUNCTION
1
CLOCK A
Clock A input
2
ENABLE A
Enable A Input
7
RESET A
Reset A Input
3, 4, 5, 6
Q1A to Q4A Data Outputs
9
CLOCK B
Clock B input
10
ENABLE B
Enable B Input
15
RESET B
Reset B Input
11,12,13,14
Q1B to Q4B Data Outputs
8
VSS
Negative Supply Voltage
16
VDD
Positive Supply Voltage
CLOCK
ENABLE
RESET
ACTION
H
L
INCREMENT COUNTER
L
L
INCREMENT COUNTER
X
L
NO CHANGE
X
L
NO CHANGE
L
L
NO CHANGE
H
L
NO CHANGE
X
X
H
Q1 THRU Q4 = 0


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