Programming instructions

CMOS
Multisim Component Reference Guide 7-12 ni.com
7.2.20 4018 (5-stage Johnson Counter)
5-stage Johnson counter truth table:
7.2.21 4019 (Quad 2-In MUX)
The 4019 device provides four multiplexing circuits with common select inputs (S
A
, S
B
);
each circuit contains two inputs (A
n
, B
n
) and one output (O
n
).
The 4018 device is a 5-stage Johnson counter with a clock input (CP), a data input (D), an
asynchronous parallel load input (PL), five parallel inputs (P0 to P4), five active LOW
buffered outputs (O
0 to O4), and an overriding asynchronous master reset input (MR).
Counter mode;
divide by
Connect D
input to
Remarks
10 O4
no external compo-
nents needed
8O3
6O2
4O1
2O0
9O3•O4
AND gate needed;
counter skips all HIGH
states
7O2
•O3
5O1•O2
300•O1
ComponentRef.book Page 12 Thursday, December 7, 2006 10:12 AM