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Part Name
Description
M74HC273 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
M74HC273
OCTAL D TYPE FLIP FLOP WITH CLEAR
STMicroelectronics
M74HC273 Datasheet PDF : 11 Pages
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M74HC273
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
1
2, 5, 6, 9, 12,
15, 16, 19
3, 4, 7, 8, 13,
14, 17, 18
11
10
20
SYMBOL
CLEAR
Q0 to Q7
D0 to D7
CLOCK
GND
Vcc
NAME AND FUNCTION
Master Reset Input
(Active LOW)
Flip Flop Outputs
Data Inputs
Clock Input (LOW to
HIGH, Edge Triggered)
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
CLEAR
L
H
H
H
X : Don’t Care
LOGIC DIAGRAM
INPUTS
CLOCK
X
OUTPUTS
FUNCTION
D
Q
X
L
CLEAR
L
L
H
H
X
Qn
NO CHANGE
This logic diagram has not be used to estimate propagation delays
2/11
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