ITT - Index of

ITT54/74192, ITT54/74193
SYNCHRONOUS 4-BITUP-DOWN COUNTER
ITT54114192 DECADE COUNTERS
TYPICAL CLEAR. LOAD. AND COUNT SEQUENCES
1. Clear outputs to zero. 3. Count up to eight. nine, carry, zero, one, and two.
2. Load (preset) to BCD seven. 4. Count down to one, zero, borrow, nine, eight. and seven.
,.{
COUNT
U,
~~~T
~~--------------------------
u
,.;.--,..-.0. 1 ,:- - - - - - - - ---- - - ---
~----------------
.J ,
.J
c================
.J
c================
~~-7'-i' .
I
_-:---'---i-'..Ji-= 1 , ==== === = = == = --~~~,-'Lfl1lLILJlJ~---------------
SEOUENCE
ILLUSTRATED
ITT54174193 BINARY COUNTERS
1 • • 0
r-- COUNT UP
,
I
~ , ' U '
0 , •
r--
'I
COUNT DOWr.I-(
TYPICAL CLEAR. LOAD. AND COUNT SEQUENCES
1. Clear outputs to zero. 3. Count up to fourteen, fifteen carry, zero, one, and two.
2. Load (preset) to BCD thirteen. 4. Count down to one, zero, borrow, fifteen, fourteen, and thirteen.
COUNT
U,
--fl'-,--r-----'--------------------:-.-----------------------------_-_-_-_-_-
"
I I
U
I I
~~================
:: : c================
~c================
I I I I
I I I I
~~================
I.' I I LJL.fl...f1..JL 1
~'b~NNT I I
I I I I I
OUTPUTS {:: ~
SEOU£NCE
IllUSTRATED
=,..: ..,.i-'.,...;-:---;'..J
oc=~
= 0, :l.U--i--:----i.-___-;.---,..__----'r-----i--
-...:'--;.'--;-:-;,--;-----,Ur-----;.-.;---------;--
, , ,
1 " '" 0
r-- CDUNlUP
,
~
I U I
r-- COUNT DOWN----'
1 ' 0 " " "I
Notes:
A. Clear overrides load, data, and count inputs.
B. When counting up, count-down input must
be high. When counting down, count-up input
must be high.
3- 235