74VHC74 데이터 시트보기 (PDF) - Fairchild Semiconductor
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74VHC74 Datasheet PDF : 8 Pages
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Logic Symbol
IEEE/IEC
Connection Diagram
Pin Descriptions
Pin Names
D1, D2
CK1, CK2
CLR1, CLR2
PR1, PR2
Q1, Q1, Q2, Q2
Description
Data Inputs
Clock Pulse Inputs
Direct Clear Inputs
Direct Preset Inputs
Output
Truth Table
Inputs
Outputs
Function
CLR PR D CK
Q
Q
LHXX
L
H
Clear
HL XX
H
L
Preset
L
H
H
H
L
H
H
H
X
L
H
X
X
H (Note 2) H (Note 2)
L
H
H
L
Qn
Qn
No Change
Note 2: This configuration is nonstable; that is, it will not persist when pre-
set and clear inputs return to their inactive (HIGH) state.
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