參數(shù)資料
型號(hào)： M54HC697C1R
廠商： 意法半導(dǎo)體
元件分類： 計(jì)數(shù)器
英文描述： HC697/699 U/D 4 BIT BINARY COUNTER/REGISTER 3-STATE HC696/698 U/D DECADE COUNTER/REGISTER 3-STATE
中文描述： HC697/699上/下4位二進(jìn)制計(jì)數(shù)器/注冊(cè)3態(tài)HC696/698上/下十進(jìn)制計(jì)數(shù)器/寄存器三態(tài)
文件頁(yè)數(shù)： 16/22頁(yè)
文件大?。?/td> 429K
代理商： M54HC697C1R
TRUTH TABLE
INPUTS
OUTPUTS
FUNCTION
CCLR LOAD
ENP
ENT
CCK
U/D
RCK
R/C
G
QA
QB
QC
QD
X
H
ZZZZ
HIGH IMPEDANCE
L
X
X (*)
X
L
CLEAR COUNTER
H
L
X
L
a
b
c
d
LOAD COUNTER
H
X
L
NO CHANGE
NO COUNT
H
X
H
X
L
NO CHANGE
NO COUNT
H
L
H
X
L
COUNT UP
H
L
X
L
COUNT DOWN
H
X
L
NO CHANGE
NO COUNT
X
H
L
a’
b’
c’
d’
LOAD REGISTER
X
H
L
NO CHANGE
NO LOAD
(*)
:
For HC698/699
X
: Don’t care
Z
: High impedance
a-d
: The level of steady state input at inputs a through D respectively
a’-d’
: The level of steady state outputs at internal counter outputs QA’ through QD’ respectively
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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