16 Sep
2007
16 Sep
'07
2:57 p.m.
From: dave06a at dunfield.com> > > Is there
anything I need to look out for when purchasing an EPROM > > eraser? As part of my
current project I'm looking to purchase one.> > Make sure it has a timer, or rig
up an external timer. All to easy to> forget about it and I've found that EPROMs
tend not to work any more> after spending several days under the lamp :-)>
Hi
When working at Intel we used to fix these by baking them
in an oven. I don't recall the temperature but it was very
hot.
I've always erases for about 25% longer then it takes to
look erased from the programmer. The time varies from
eraser to eraser and also from EPROM type.
Newer EPROMs only seem to need about 10 minutes in
the eraser that I use most of the time. Those that require
20 volts or more to program seem to take longer.
You need a quartz tube murcury lamp to erase. Many
have used dryer lamps. Any lamp from an ozone generator
should work ( many have these on hot tubes ).
If you have a way to keep it cool, a quartz halogen
lamp might work but I've never given this a try.
A carbon arc would work as well but I've not seen these
since they've stopped using these in search lights.
Dwight
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