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| 74HC191 Datasheet, PDF (7/14 Pages) NXP Semiconductors – Presettable synchronous 4-bit binary up/down counter | |||
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Philips Semiconductors
Presettable synchronous 4-bit binary
up/down counter
Sequence
Load (preset) to binary thirteen;
count up to fourteen, fifteen,
zero, one and two;
inhibit;
count down to one, zero, fifteen,
fourteen and thirteen.
Fig.8 Typical load, count and
inhibit sequence.
Product speciï¬cation
74HC/HCT191
December 1990
Fig.9 Logic diagram.
7
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