[sdiy] 8253 modern replacement?

[Ullrich Peter]

Hi Roman!

You can buy them cheaper at ebay - but buy more to save postage...

http://www.ebay.com/itm/N82C54-Intel-8-MHz-Progammable-Interval-Timer-CHMOS-PLCC28-2-pieces-/261614618292?pt=LH_DefaultDomain_0&hash=item3ce97246b4

http://www.ebay.com/itm/1x-OKI-M82C54-2-Microprocessor-Peripheral-PLCC-28-/171374687378?pt=LH_DefaultDomain_0&hash=item27e6ba3492

Ciao
Peter

-----Ursprüngliche Nachricht-----
Von: synth-diy-bounces at dropmix.xs4all.nl [mailto:synth-diy-bounces at dropmix.xs4all.nl] Im Auftrag von Roman Sowa
Gesendet: Freitag, 08. Mai 2015 15:50
An: synth-diy at dropmix.xs4all.nl
Betreff: Re: [sdiy] 8253 modern replacement?

That's another example of higher power syncing all our minds around the globe. I was thinking about exactly the same and started the design of  programmable counter using generic logic parts: 4x74161 and 2x74595.
The result was about 3x3.5cm PCB for one 16-bit counter. Definitely too big for me. So I turned back to the old counter chip and bought them in PLCC, which is so much smaller than my silly attempt.
Yes, they are still made today by Intersil, but a bit pricey for such a simple device, about $8 for single 82c54, which is just slightly improved 8253.

Roman

W dniu 2015-05-08 o 15:12, Jack Jackson pisze:
> The 8253 programmable interval timer IC was used a lot in the 80s for 
> generating frequencies for DCOs. Is there an easier way to do this in 
> modern times? Maybe a modern IC with a smaller footprint or something 
> else entirely?
>
> Best, Jack _______________________________________________ Synth-diy 
> mailing list Synth-diy at dropmix.xs4all.nl 
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
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