參數(shù)資料
型號(hào): CD74HC194NSR
廠商: Texas Instruments, Inc.
元件分類: 通用總線功能
英文描述: High-Speed CMOS Logic 4-Bit Bidirectional Universal Shift Register
中文描述: 高速CMOS邏輯4位雙向通用移位寄存器
文件頁(yè)數(shù): 2/13頁(yè)
文件大?。?/td> 339K
代理商: CD74HC194NSR
2
Functional Diagram
TRUTH TABLE
OPERATING
MODE
INPUTS
OUTPUT
CP
MR
S1
S0
DSR
DSL
D
n
Q
0
Q
1
Q
2
Q
3
Reset (Clear)
X
L
X
X
X
X
X
L
L
L
L
Hold (Do Nothing)
X
H
l (Note 1)
l (Note 1)
X
X
X
q
0
q
1
q
2
q
3
Shift Left
H
h
l (Note 1)
X
l
X
q
1
q
2
q
3
L
H
h
l (Note 1)
X
h
X
q
1
q
2
q
3
H
Shift Right
H
l (Note 1)
h
l
X
X
L
q
0
q
1
q
2
H
l (Note 1)
h
h
X
X
H
q
0
q
1
q
2
Parallel Load
H
h
h
X
X
d
n
d
0
d
1
q
2
d
3
H = High Voltage Level,
h = High Voltage Level One Set-up Time Prior To The Low to High Clock Transition,
L = Low Voltage Level,
l = Low Voltage Level One Set-up Time Prior to the Low to High Clock Transition,
d
n
(q
n
) = Lower Case Letters Indicate the State of the Referenced Input (or output) One Set-up Time Prior to the Low To High Clock
Transition,
X = Don’t Care,
= Transition from Low to High Level
NOTE:
1. The High-to-Low transition of the S0 and S1 Inputs on the ’HC194 and CD74HCT194 should take place only while CP is High for
Conventional Operation.
14
12
13
15
Q
0
Q
1
Q
2
Q
3
7
6
3
4
5
D
0
D
1
D
2
D
3
GND = 8
V
CC
= 16
2
9
10
1
11
DSL
DSR
S0
S1
MR
CP
CD54HC194, CD74HC194, CD74HCT194
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