
74ACT273
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
S YM BO L
CLEAR
Q0 to Q7
D0 to D7
CLOCK
GND
VCC
NAME AND FUNCTION
Asyncronous Master
Reset (Active LOW)
Flip-Flop Outpus
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
INPUTS
D
X
L
H
X
LOGIC DIAGRAMS
CLOCK
X
OUTPUTS
Q
L
L
H
Qn
FUNCTION
CLEAR
NO CHANGE
Thislogic diagram has notbe used to esimate propagation delays
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