Philips Semiconductors
Product specification
5-stage Johnson counter
APPLICATION INFORMATION
Some examples of applications for the HEF4017B are:
•
Decade counter with decimal decoding
•
1 out of n decoding counter (when cascaded)
•
Sequential controller
•
Timer.
HEF4017B
MSI
Figure 7 shows a technique for extending the number of decoded output states for the HEF4017B. Decoded outputs are
sequential within each stage and from stage to stage, with no dead time (except propagation delay).
Fig.7 Counter expansion.
Note
It is essential not to enable the counter on CP
1
when CP
0
is HIGH, or on CP
0
when CP
1
is LOW, as the this would cause
an extra count.
January 1995
8
PHILIPS [ NXP SEMICONDUCTORS ]
