Datasheet
Table Of Contents

December 1990 4
Philips Semiconductors Product speciļ¬cation
Dual 4-bit binary ripple counter 74HC/HCT393
Fig.4 Functional diagram. Fig.5 State diagram.
Fig.6 Logic diagram (one counter).
COUNT SEQUENCE FOR 1 COUNTER
Notes
1. H = HIGH voltage level
L = LOW voltage level
COUNT
OUTPUTS
Q
0
Q
1
Q
2
Q
3
0
1
2
3
L
H
L
H
L
L
H
H
L
L
L
L
L
L
L
L
4
5
6
7
L
H
L
H
L
L
H
H
H
H
H
H
L
L
L
L
8
9
10
11
L
H
L
H
L
L
H
H
L
L
L
L
H
H
H
H
12
13
14
15
L
H
L
H
L
L
H
H
H
H
H
H
H
H
H
H