參數(shù)資料
型號: M74HC161TTR
廠商: 意法半導體
元件分類: 通用總線功能
英文描述: SYNCHRONOUS PRESETTABLE 4-BIT COUNTER
中文描述: 同步預置4位計數(shù)器
文件頁數(shù): 3/16頁
文件大?。?/td> 331K
代理商: M74HC161TTR
TRUTH TABLE
M54/74HC160/161
INPUTS
LD
PE
X
X
L
X
H
X
H
L
H
H
X
X
X
: Don’tCare
A, B, C, D : Logi level ofdata inputs
Carry
: CARRY =TE
Q
A
Q
B
Q
C
Q
D
............ (M54/74HC160/162)
: CARRY =TE
Q
A
Q
B
Q
C
Q
D
............ (M54/74HC161/163)
M54/74HC162/163
INPUTS
LD
PE
X
X
L
X
H
X
H
L
H
H
X
X
OUTPUTS
FUNCTION
CLR
L
H
H
H
H
H
Note:
TE
X
X
L
X
H
X
CK
X
CLR
L
H
H
H
H
X
TE
X
X
L
X
H
X
CK
QA
L
A
QB
L
B
NO CHANGE
NO CHANGE
COUNT UP
NO CHANGE
QC
L
C
QD
L
D
RESET TO ”0”
PRESET DATA
NO COUNT
NO COUNT
COUNT
NO COUNT
TIMING CHART
(HC160/162 : decade counter)
M54/M74HC160/161/162/163
3/16
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