AW: [sdiy] odd number counter??

Czech Martin Martin.Czech at Micronas.com
Mon Nov 12 12:16:49 CET 2001


I've just seen an asynchronous CMOS binary counter circuit(:16).
It uses up to four diodes for decoding any number thus enabling reset.
This circuit can be made to divide by almost anything you want
it to.

Downside: you must be absolutely sure that no glitches escape.
Therefore capaictor on the reset pin, diodes tend to be slow anyway.

I thought that really no one would like to see *such* a circuit,
but now I'd perhaps dig it out again.

This time I know exactly where it is (living room table!)

;->

m.c.

> -----Ursprüngliche Nachricht-----
> Von: media at mail1.nai.net [mailto:media at mail1.nai.net]
> Gesendet: Sonntag, 11. November 2001 19:14
> An: synth-diy at dropmix.xs4all.nl
> Betreff: [sdiy] odd number counter??
> 
> 
> 
> I need a counter that can divide by odd numbers.  Does anyone 
> still make
> the CD4018??  I thought I was all set until I tried to look 
> up the price in
> the Digikey catalog.  According to their websites, it's been 
> discontinued
> by Harris, Phillips, National, and Fairchild.  While they 
> seem to be in
> stock at a few places that specialize in obsolete chips, I'd 
> rather not use
> a dead chip in a new design.
> 
> I can't seem to find a cross reference.  Anyone have any ideas on a
> replacement??
> 
> 
> 
> 
> 



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