dm74ls293 National Semiconductor Corporation, dm74ls293 Datasheet - Page 4

• Manufacturer Part Number: dm74ls293
• Description: 4-bit Binary Counter
• Manufacturer: National Semiconductor Corporation

Function Tables
Note C Output Q
Logic Diagram
Count
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
Count Sequence (See Note C)
A
is connected to input B
Q
Note The J and K inputs shown without connection are for reference only and are functionally at a high level
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
D
Q
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
C
Outputs
Q
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
B
Q
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
A
LS293
4
H
e
R0(1)
High Level L
Reset Inputs
H
L
X
R0(2)
e
Reset Count Truth Table
H
X
L
Low Level X
Q
L
TL F 6423 – 2
D
e
Don’t Care
Q
L
C
Outputs
COUNT
COUNT
Q
L
B
Q
L
A