16 Sep
2007
16 Sep
'07
9:06 p.m.
On Sep 16, 2007, at 7:47 AM, Gordon JC Pearce wrote:
How long should you erase EPROMs for? "Until they're done", I
suppose,
but does it vary from chip to chip? I tend to stick a big mixed batch
of 2764 up to 27c2001 in (zapping samples blown into EPROMs) and
bung it
on for half an hour. The timer on my eraser goes up to 60 minutes.
It varies from chip to chip, and from eraser to eraser. More
modern parts (EPROM-based PIC microcontrollers for example) can be
erased in less than ten minutes in my eraser. Older EPROMs like
2716s take upwards of half an hour, sometimes 45mins.
-Dave
--
Dave McGuire
Port Charlotte, FL
Farewell Ophelia, 9/22/1991 - 7/25/2007
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 :-)