M54HC4520 데이터 시트보기 (PDF) - STMicroelectronics
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M54HC4520 Datasheet PDF : 13 Pages
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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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