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74ACT74 Datasheet(PDF) 2 Page - STMicroelectronics

Part No. 74ACT74
Description  DUAL D-TYPE FLIP FLOP WITH PRESET AND CLEAR
Download  11 Pages
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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74ACT74 Datasheet(HTML) 2 Page - STMicroelectronics

 
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74ACT74
2/12
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
TRUTH TABLE
X : Don’t Care
LOGIC DIAGRAM
This logic diagram has not be used to estimate propagation delays
PIN No
SYMBOL
NAME AND FUNCTION
1, 13
1CLR, 2CLR
Asyncronous Reset -
Direct Input
2, 12
1D, 2D
Data Inputs
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
INPUTS
OUTPUTS
FUNCTION
CLR
PR
DCK
Q
Q
L
H
X
X
L
L
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


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