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DM74LS293N Datasheet(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # DM74LS293N
Description  4-Bit Binary Counter
Download  6 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

DM74LS293N Datasheet(HTML) 4 Page - National Semiconductor (TI)

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Function Tables
Count Sequence (See Note C)
Count
Outputs
QD
QC
QB
QA
0L
L
L
L
1L
L
L
H
2L
L
H
L
3L
L
H
H
4L
H
L
L
5L
H
L
H
6L
H
H
L
7L
H
H
H
8H
L
L
L
9H
L
L
H
10
H
L
H
L
11
H
L
H
H
12
H
H
L
L
13
H
H
L
H
14
H
H
H
L
15
H
H
H
H
Note C
Output QA is connected to input B
ResetCount Truth Table
Reset Inputs
Outputs
R0(1)
R0(2)
QD
QC
QB
QA
HH
L
L
L
L
L
X
COUNT
X
L
COUNT
H e High Level L e Low Level X e Don’t Care
Logic Diagram
LS293
TLF6423 – 2
Note
The J and K inputs shown without connection are for reference only and are functionally at a high level
4


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