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M74HC4518 View Datasheet(PDF) - STMicroelectronics

Part NameDescriptionManufacturer
M74HC4518 HC4520 DUAL 4 BIT BINARY COUNTER HC4518 DUAL DECADE COUNTER ST-Microelectronics
STMicroelectronics ST-Microelectronics
M74HC4518 Datasheet PDF : 13 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
M54/M74HC4518/4520
TRUTH TABLE
CLOCK
L
X
H
X
X: Don’t Care Z: High Impedance
INPUTS
ENABLE
H
X
L
X
PIN DESCRIPTION
PIN No
1, 9
2, 10
3, 4, 5, 6
7, 15
11, 12, 13,
14
8
16
SYMBOL
1CLOCK,
2CLOCK
1ENABLE,
2ENABLE
1Q0 to 1Q3
1CLEAR,
2CLEAR
2Q0 to 2Q3
GND
VCC
NAME AND FUNCTION
Clock Inputs (LOW to
HIGH, Edge-triggered)
Clock Enable Inputs
Data Outputs
Asynchronous Reset
Inputs (Active LOW)
Data Outputs
Ground (0V)
Positive Supply Voltage
IEC LOGIC SYMBOLS
HC4518
CLEAR
L
L
L
L
L
L
H
FUNCTION
INCREMENT COUNTER
INCREMENT COUNTER
NO CHANGE
NO CHANGE
NO CHANGE
NO CHANGE
Q0 THRU Q3 = L
INPUT AND OUTPUT EQUIVALENT CIRCUIT
HC4520
4/13
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