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参数资料
| 型号： | M54HC696 |
| 厂商： | 意法半导体 |
| 元件分类： | 通用总线功能 |
| 英文描述： | Decade Up/Down Counter/Register(十进制加/减计数器/寄存器(三态)) |
| 中文描述： | 十年加/减计数器/寄存器（十进制加/减计数器/寄存器（三态）） |
| 文件页数： | 3/22页 |
| 文件大小： | 429K |
| 代理商： | M54HC696 |
TRUTH TABLE
INPUTS
ENT
X
X
X
X
H
L
L
X
X
X
OUTPUTS
QB
Z
L
b
NO CHANGE
NO CHANGE
COUNT UP
COUNT DOWN
NO CHANGE
b’
NO CHANGE
FUNCTION
CCLR LOAD
X
L
H
H
H
H
H
H
X
X
(*)
X
Z
a-d
a’-d’
ENP
X
X
X
H
X
L
L
X
X
X
ForHC698/699
: Don’t care
: High impedance
: The level of steady state inputat inputs a throughD respectvely
: The level of steady state outputs at internal counter outputs QA’ through QD’respectively
CCK
X
X (*)
U/D
X
X
X
X
X
H
L
X
X
X
RCK
X
X
X
X
X
X
X
X
R/C
X
L
L
L
L
L
L
L
H
H
G
H
L
L
L
L
L
L
L
L
L
QA
Z
L
a
QC
Z
L
c
QD
Z
L
d
X
X
L
H
H
H
H
X
X
X
HIGH IMPEDANCE
CLEAR COUNTER
LOAD COUNTER
NO COUNT
NO COUNT
COUNT UP
COUNT DOWN
NO COUNT
LOAD REGISTER
NO LOAD
X
X
a’
c’
d’
:
RCO function : HC696/8 - RCO= (UP
QA
QD
ENT+ UP
QA
QD
ENT)
HC697/9 -RCO = (UP
QA
QB
QC
QD
ENT + UP
QA
QB
QC
QD
ENT)
BLOCK DIAGRAM
M54/M74HC696/697/698/699
3/22
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