參數(shù)資料
型號(hào): 74FR74SCX
英文描述: Dual D-Type Flip-Flop
中文描述: 雙D型觸發(fā)器
文件頁(yè)數(shù): 2/8頁(yè)
文件大小: 79K
代理商: 74FR74SCX
www.fairchildsemi.com
2
7
Logic Symbols
74FR74
74FR1074
Pin Descriptions
Truth Tables
74FR74
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
Z
=
High Impedance
X
=
Immaterial
=
Rising Edge
Q
0
=
Previous Q(Q) before LOW-to-HIGH Clock Transition
74FR1074
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
Z
=
High Impedance
X
=
Immaterial
=
Falling Edge
Q
0
=
Previous Q(Q) before HIGH-to-LOW Clock Transition
Pin Names
D
n
CP
n
S
Dn
C
Dn
Q
n
Q
n
Description
Data Inputs
Clock Inputs
Asynchronous Set Inputs
Asynchronous Clear Inputs
True Output
Complementary Output
Inputs
Outputs
SD
L
H
L
H
H
H
CD
H
L
L
H
H
H
CP
X
X
X
D
X
X
X
H
L
X
Q
H
L
H
H
L
Q
0
Q
L
H
H
L
H
Q
0
L
Inputs
Outputs
SD
L
H
L
H
H
H
CD
H
L
L
H
H
H
CP
X
X
X
D
X
X
X
H
L
X
Q
H
L
H
H
L
Q
0
Q
L
H
H
L
H
Q
0
L
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