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Description
74VHC74(2014) View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
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74VHC74
(Rev.:2014)
Dual D-Type Flip-Flop with Preset and Clear
Fairchild Semiconductor
74VHC74 Datasheet PDF : 10 Pages
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Connection Diagram
Logic Symbol
IEEE/IEC
Pin Description
Pin Names
D
1
, D
2
CK
1
, CK
2
CLR
1
, CLR
2
PR
1
, PR
2
Q
1
, Q
1
, Q
2
, Q
2
Description
Data Inputs
Clock Pulse Inputs
Direct Clear Inputs
Direct Preset Inputs
Output
Truth Table
Inputs
Outputs
CLR PR D CK Q
Q Function
L
HXX
L
H Clear
H LXX H
L Preset
L
L X X H
(1)
H
(1)
H HL
L
H
H HH
H
L
H HX
Q
n
Q
n
No Change
Note:
1. This configuration is nonstable; that is, it will not persist
when preset and clear inputs return to their inactive
(HIGH) state.
©1992 Fairchild Semiconductor Corporation
74VHC74 Rev. 1.3.1
2
www.fairchildsemi.com
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