[sdiy] EPROM curiosity

[Roman Sowa]

I'd stay away from "failed devices".
I don't care for 2716, usually just buy 27C256, as this is basically the 
smallest you can get nowadays, and adapt the pinout. I did that with 
2764 recently, with only 1 pin needing a change, but 2716 is smaller and 
it may not be that easy.

As for Ukrainian clones - get them while you can, before the tanks ride 
over the factory.

Roman

W dniu 2014-05-08 14:47, Steve Lenham pisze:
> I use a fair few EPROMs for firmware upgrades in synths and effects
> units. From time to time (and with my eyes fully open) I have purchased
> "new" EPROMs from Chinese eBay sellers, especially smaller-capacity
> parts (2716, 2732, etc). What I receive are sparkly-new-looking devices
> which - so far at least - program up and work just fine.
>
> However, I wasn't born yesterday and know that the chances of them
> really being new parts from the stated manufacturer are pretty slim. My
> question is this: has anyone got any insight into what these devices
> might really be?
>
> A frequent answer is "failed devices from the factory bin", but I didn't
> think anyone had been making 2716s for some time. Larger-capacity
> devices packaged with a different pinout? If that is the case, they are
> performing a useful service! Recycled used parts? If so, I would like
> the same guys to come and clean my workshop because they are pristine.
>
> Or am I being too cynical? Maybe they are what they claim to be!
>
> Please note: I'm just curious about the technicalities here and don't
> need to be warned off buying from Chinese eBay sellers...we've all read
> the horror stories but a bit of risk can be fun :-)
>
> Anyhow, I don't need Chinese 2716s now that I've discovered the
> Ukrainian clones that were still in production well into the '90s...
>
> Cheers,
>
> Steve L.
> Benden Sound Technology
>
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