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74VHC74T Fiches technique(PDF) 2 Page - STMicroelectronics

No de pièce 74VHC74T
Description  DUAL D-TYPE FLIP FLOP WITH PRESET AND CLEAR
Download  10 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

74VHC74T Fiches technique(HTML) 2 Page - STMicroelectronics

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INPUT EQUIVALENT CIRCUIT
LOGIC DIAGRAMS
PIN DESCRIPTION
PIN No
SYMBOL
NAME AND FUNCT ION
1, 13
1CLR,
2CLR
Asyncronous Reset -
Direct Input
2, 12
1D, 2D
Data Input
3, 11
1CK, 2CK
Clock Input
(LOW-to-HIGH, Edge-
Triggered)
4, 10
1PR, 2PR
Asyncronous Set - Direct
Input
5, 9
1Q, 2Q
True Flip-Flop Outputs
6, 8
1Q, 2Q
Complement Flip-Flop
Outputs
7
GND
Ground (0V)
14
VCC
Positive Supply Voltage
TRUTH TABLE
I NPUTS
OUT PUT S
F UNCTI ON
CLR
PRDCK
Q
Q
L
H
X
X
L
H
CLEAR
H
L
X
X
H
L
PRESET
LL
X
X
H
H
HH
L
L
H
HHH
H
L
HH
X
Qn
Qn
NO CHANGE
X:Don’t Care
Thislogic diagram has notbe used to estimate propagation delays
74VHC74
2/10


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