M74HC393 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
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M74HC393 Datasheet PDF : 11 Pages
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M74HC393
INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
INPUTS
CLOCK
CLEAR
QD
X
H
L
L
L
X : Don’t Care
COUNT
QD
0
L
1
L
2
L
3
L
4
L
5
L
6
L
7
L
8
H
9
H
10
H
11
H
12
H
13
H
14
H
15
H
PIN DESCRIPTION
PIN No
1, 13
2, 12
3, 4, 5, 6
11, 10, 9, 8
7
14
SYMBOL NAME AND FUNCTION
1 CLOCK
2 CLOCK
Clock Input Divide by 2
Section (HIGH to LOW
Edge-Triggered)
1 CLEAR Asynchronous Master
2 CLEAR Reset Inputs
1QA to 1QD Flip Flop Outputs
2QA to 2QD Flip Flop Outputs
GND Ground (0V)
Vcc
Positive Supply Voltage
OUTPUTS
QC
QB
QA
L
L
L
COUNT UP
NO CHANGE
OUTPUTS
QC
QB
QA
L
L
L
L
L
H
L
H
L
L
H
H
H
L
L
H
L
H
H
H
L
H
H
H
L
L
L
L
L
H
L
H
L
L
H
H
H
L
L
H
L
H
H
H
L
H
H
H
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