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74LS192 pdf datasheet
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格式:rar |
大小:333 |
2008-08-06
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54LS192/DM74LS192 Up/Down Decade Counter
with Separate Up/Down Clocks
General Description
The 'LS192 is an up/down BCD decade (8421) counter.
Separate Count Up and Count Down Clocks are used and in
either counting mode the circuits operate synchronously.
The outputs change state synchronous with the LOW-to-
HIGH transitions on the clock inputs.
Separate Terminal Count Up and Terminal Count Down outputs
are provided which are used as the clocks for a subsequent
stage without extra logic, thus simplifying multistage
counter designs. Individual preset inputs allow the circuits to
be used as programmable counters. Both the Parallel Load
(PL) and the Master Reset (MR) inputs asynchronously
override the clocks.
with Separate Up/Down Clocks
General Description
The 'LS192 is an up/down BCD decade (8421) counter.
Separate Count Up and Count Down Clocks are used and in
either counting mode the circuits operate synchronously.
The outputs change state synchronous with the LOW-to-
HIGH transitions on the clock inputs.
Separate Terminal Count Up and Terminal Count Down outputs
are provided which are used as the clocks for a subsequent
stage without extra logic, thus simplifying multistage
counter designs. Individual preset inputs allow the circuits to
be used as programmable counters. Both the Parallel Load
(PL) and the Master Reset (MR) inputs asynchronously
override the clocks.
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