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MM74HC191 Datasheet, National Semiconductor

MM74HC191 counters equivalent, synchronous binary up/down counters.

MM74HC191 Avg. rating / M : 1.0 rating-14

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MM74HC191 Datasheet

Features and benefits

Y Level changes on Enable or Down Up can be made regardless of the level of the clock input Y Wide power supply range 2
  – 6V Y Low quiescent supply curren.

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