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M54HC74D Fiches technique(PDF) 2 Page - STMicroelectronics

No de pièce M54HC74D
Description  RAD HARD DUAL D TYPE FLIP FLOP WITH PRESET AND CLEAR
PDF  12 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M54HC74D Fiches technique(HTML) 2 Page - STMicroelectronics

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Figure 1: IEC Logic Symbols
Figure 2: Input And Output Equivalent Circuit
Table 1: Pin Description
Table 2: Truth Table
X : Don’t Care
PIN N°
SYMBOL
NAME AND FUNCTION
1,13
1CLR,2CLR
Asynchronous Reset -
Direct Input
2, 12
1D, 2D
Data Inputs
3, 11
1CK, 2CK
Clock Input
(LOW-to-HIGH,
Edge-Triggered)
4, 10
1PR,2PR
Asynchronous 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
LH
X
X
LH
CLEAR
H
L
X
X
H
L
PRESET
L
L
X
X
H
H
----
H
H
L
L
H
----
H
H
H
H
L
----
HH
X
Qn
Qn
NO CHANGE



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