參數(shù)資料
型號： M54HC4518M1R
廠商： 意法半導(dǎo)體
英文描述： TERM. F/O CABLE SC-SC/ DPLX/RISER/10M/YELLOW
中文描述： HC4518雙十進(jìn)制計數(shù)器HC4520雙4位二進(jìn)制計數(shù)器
文件頁數(shù)： 4/13頁
文件大?。?/td> 270K
代理商： M54HC4518M1R
TRUTH TABLE
INPUTS
ENABLE
H
FUNCTION
CLOCK
CLEAR
L
L
L
L
L
L
H
INCREMENT COUNTER
INCREMENT COUNTER
NO CHANGE
NO CHANGE
NO CHANGE
NO CHANGE
Q0 THRU Q3 = L
L
X
X
L
H
X
X
X:Don’tCare Z: High Impedance
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
1, 9
SYMBOL
1CLOCK,
2CLOCK
1ENABLE,
2ENABLE
1Q0 to 1Q3
1CLEAR,
2CLEAR
2Q0 to 2Q3
NAME AND FUNCTION
Clock Inputs (LOW to
HIGH, Edge-triggered)
Clock Enable Inputs
2, 10
3, 4, 5, 6
7, 15
Data Outputs
Asynchronous Reset
Inputs (Active LOW)
Data Outputs
11, 12, 13,
14
8
16
GND
V
CC
Ground (0V)
Positive Supply Voltage
IEC LOGIC SYMBOLS
HC4518
HC4520
M54/M74HC4518/4520
4/13
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