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<strong>ITT</strong>54160 THRU <strong>ITT</strong>54163, <strong>ITT</strong>74160THRU <strong>ITT</strong>74163<br />

SYNCHRONOUS 4-BIT COUNTERS<br />

<strong>ITT</strong>54161. <strong>ITT</strong>54163. <strong>ITT</strong>74161. <strong>ITT</strong>74163 SYNCHRONOUS BINARY COUNTERS<br />

typical clear. preset. count. and inhibit sequences<br />

Illustrated below is the following sequence:<br />

1. Clear outputs to zero.<br />

2. Preset to binary twelve.<br />

3. Count to thirteen. fourteen. fifteen. zero. one. and two.<br />

4. Inhibit.<br />

CLEAR<br />

(54161,741Gn<br />

CLEAR<br />

(54163,741631<br />

DATA<br />

INPUTS<br />

LOAD<br />

U IASYNCHRONOUS'<br />

I<br />

LlJ ISYNCHRONOUSI<br />

U<br />

A<br />

,--<br />

I<br />

C--.J<br />

I<br />

I<br />

I<br />

I--<br />

I<br />

I<br />

1_-<br />

CLOCK<br />

154lt,1 l,~ 1 G 11<br />

O--.J<br />

, I<br />

I. 1_-<br />

,<br />

I<br />

I<br />

ClOCK<br />

(541G3.741G3'<br />

eNABLE P<br />

ENABLE T<br />

OUTPUTS<br />

OA<br />

OB ,<br />

Oc<br />

aD<br />

CARRY<br />

-,<br />

=LJ I<br />

I<br />

--I<br />

__ LJ<br />

I<br />

I<br />

I<br />

: 12<br />

I<br />

CLEAR PRESET<br />

,13 14<br />

I·<br />

II<br />

15<br />

L...-__ -1I:<br />

I<br />

I<br />

2'<br />

COUNT -----··i·-----INHIBIT----<br />

3-198

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