参数资料
型号: M54HC4518M1R
厂商: 意法半导体
英文描述: TERM. F/O CABLE SC-SC/ DPLX/RISER/10M/YELLOW
中文描述: HC4518双十进制计数器HC4520双4位二进制计数器
文件页数: 4/13页
文件大小: 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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