Re: Clearing EPROMs: How much time to lay in the sun?

From: Rainer Buchty (
Date: 2006-07-16 21:21:48

> - A mid-summer Northern emisphere location at Sea level, 60% humidity, 
>   sunny exposure (75% of total sunlight):  ~ 15 days

I doubt that the EPROM is *really* erased after that period.

Have a look at this:

(Explanations in German, but Babelfish should do a somewhat good job on 

Apart from the erase patterns (see animated GIFs), the really 
interesting part is that even when using an EPROM eraser until the EPROM 
is erased (3 minutes worst) data comes back when you lower the supply 
voltage from 5V to 3V.

To surely erase an EPROM it takes 10 minutes.


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