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DM74LS192 - Up/Down Decade Counter

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-toHIGH transitions on the clock inputs Separate Terminal Count Up and Terminal Count Do

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Other Datasheets by National Semiconductor (now Texas Instruments)

Part Number Description
DM74LS190 Synchronous 4-Bit Up/Down Counters
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DM74LS109A Dual Positive-Edge-Triggered J-K Flip-Flops
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54LS192 DM74LS192 Up Down Decade Counter with Separate Up Down Clocks May 1992 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-toHIGH 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 Connection D