參數(shù)資料
型號： M54HC699M1R
廠商： 意法半導體
元件分類： 通用總線功能
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位二進制計數(shù)器/注冊3態(tài)HC696/698上/下十進制計數(shù)器/寄存器三態(tài)
文件頁數(shù)： 3/22頁
文件大?。?/td> 429K
代理商： M54HC699M1R
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
相關PDF資料
PDF描述
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