參數(shù)資料
型號(hào): 100336D
廠商: National Semiconductor Corporation
元件分類: 通用總線功能
英文描述: Low Power 4-Stage Counter/Shift Register
中文描述: 低功耗4級(jí)計(jì)數(shù)器/移位寄存器
文件頁(yè)數(shù): 4/16頁(yè)
文件大?。?/td> 318K
代理商: 100336D
Function Select Table
S
2
L
L
L
L
H
H
H
H
S
1
L
L
H
H
L
L
H
H
S
0
L
H
L
H
L
H
L
H
Function
Parallel Load
Complement
Shift Left
Shift Right
Count Down
Clear
Count Up
Hold
Truth Table
Q
0
= LSB
Inputs
CEP
Outputs
Q
1
P
1
Q
1
Q
2
Q
0
MR
L
L
L
L
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
H
S
2
L
L
L
L
H
H
H
H
H
H
H
H
L
L
L
L
H
H
H
H
H
S
1
L
L
H
H
L
L
L
L
H
H
H
H
L
L
H
H
L
L
L
H
H
S
0
L
H
L
H
L
L
L
H
L
L
L
H
L
H
L
H
L
L
H
L
H
D
0
/CET
X
X
X
X
L
L
H
X
L
L
H
X
X
X
X
X
L
H
X
X
X
D
3
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
CP
Q
3
P
3
Q
3
D
3
Q
2
Q
2
P
2
Q
2
Q
3
Q
1
Q
0
P
0
Q
0
Q
1
D
0
TC
L
L
D
3
Mode
X
X
X
X
L
H
X
X
L
H
X
X
X
X
X
X
X
X
X
X
X
N
Preset (Parallel Load)
Invert
Shift to LSB
Shift to MSB
Count Down
Count Down with CEP not active
Count Down with CET not active
Clear
Count Up
Count Up with CEP not active
Count Up with CET not active
Hold
N
N
N
Q
3
(Note 1)
1
1
H
H
2
2
H
H
L
L
L
L
L
H
H
H
H
N
(Q
0–3
) minus 1
Q
2
Q
2
L
(Q
0–3
) plus 1
Q
2
Q
2
Q
2
L
L
L
L
L
L
L
L
L
X
X
Q
3
Q
3
L
Q
1
Q
1
L
Q
0
Q
0
L
N
N
X
X
X
X
X
X
X
X
X
X
X
X
Q
3
Q
3
Q
3
L
L
L
L
L
L
L
L
L
Q
1
Q
1
Q
1
L
L
L
L
L
L
L
L
L
Q
0
Q
0
Q
0
L
L
L
L
L
L
L
L
L
Asynchronous
Master Reset
1 =
H if Q
–Q
3
LLLL
2 = L if Q
0
–Q
= HHHH
H if Q
–Q
HHHH
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
N
= LOW-to-HIGH Transition
Note 1:
Before the clock, TC is Q
3
After the clock, TC is Q
2
L if Q
0
–Q
= LLLL
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