IC Pulls

On 5 Feb 2012 at 1:59, jim s wrote: The chances are good that they'll work--EPROMs are pretty rugged. Sorting them out is an interesting problem. Obviously, the ones with missing leads, or cracked packages/windows are junk--so the first thing would be a cosmetic sort--and you can sort by type in the same pass. So now you have several piles--junk, and then by type. Next would be to sort the types out--try reading one. Since they're used, if they come up with some data, you can put those in the "probably good" pile for each type. If they come up FFs, they might be erased or simply bad. If they come up 00 or all the same pattern, but not FF, those are probably bad. Finally, erase the lot (unless you want to save contents), erase and attempt a program and verify. Those that pass would be the "good" ones. Alternatively, you have to balance what your time is worth against what you expect to make. You might just bag bunches up in anti- static bags and do the old Poly-Paks thing--some mignt be good, some not; it's up to the buyer to determine which. Before you do that, I think it would be a fine idea to pull a couple of sample bags and see what the yield is. The sure-fire way to kill most EPROMs is to install them upside-down and let electricity take its course. But as I said, UVEPROMs are pretty rugged things. --Chuck