Programming instructions

TTL
Multisim Component Reference Guide 6-26 ni.com
Sample decade counter truth table:
6.4.50 74xx163 (Sync 4-bit Binary Counter)
This synchronous, presettable, 4-bit binary counter features an internal carry look-ahead for
fast counting.
INPUTS OUTPUTS
OPERATING
MODE
SR
CP CEP CET PE DN QN TC
l · XXXX0 0 Reset (clear)
h·XXll00
Parallel load
h· XXl h1(2)
h· hhhXcoun
t
(2) Count
hXl XhXq
n
(2) Hold (do nothing)
hXXl h Xq
n
0
1 = High voltage level
h = High voltage level one setup prior to the low-to-high clock transition
0 = Low voltage level
l = Low voltage level one setup prior to the low-to-high clock transition
q
n
= Lower case letters indicate the state of the referenced output prior to the
low-to-high clock transition
X = Don’t care
· = Low-to-high clock transition
(2) = The TC output is High when CET is High and the counter is at Terminal
Count (HLLH)
ComponentRef.book Page 26 Thursday, December 7, 2006 10:12 AM