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| 74HC190 Datasheet, PDF (7/13 Pages) NXP Semiconductors – Presettable synchronous BCD decade up/down counter | |||
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Philips Semiconductors
Presettable synchronous BCD decade
up/down counter
Product speciï¬cation
74HC/HCT190
Sequence
Load (present) to BCD seven;
count up to eight, nine, zero,
one and two;
inhibit;
count down to one, zero, nine,
eight and seven.
Fig.8 Typical load, count and inhibit sequence.
December 1990
Fig.9 Logic diagram.
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