74HC4510 Datasheet, PDF(12/12 Page) NXP Semiconductors

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74HC4510 Datasheet, PDF (12/12 Pages) NXP Semiconductors – BCD up/down counter

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Philips Semiconductors

BCD up/down counter

Product speciï¬cation

74HC/HCT4510

Count-up mode: illegal states in

BCD counters corrected in one count.

Count-down mode: illegal states in

BCD counters corrected in one or

two counts.

Count-up mode.

Fig.14 State diagram.

Count-down mode.

Use the following formulae to calculate Ntotal:

ï£±i

ï£¼

Ïï£´

ï£´

Ntotal =

ï£²

ï£´

( 10

Ni)

ï£½

ï£´

ï£³1

ï£¾

fout = N-----ft--oi-n-t--a--l

Formulae are only applicable if legal data is

provided to the parallel inputs.

Fig.15 Programmable cascaded frequency divider.

parallel inputs

D1 D0

Note

1. no count; fout is HIGH.

count-up

(1)

count-down

(1)

PACKAGE OUTLINES

See â74HC/HCT/HCU/HCMOS Logic Package Outlinesâ.

December 1990