Does age affect the erase time for Flash memory ?. I have a batch of identical chips, some erase is 6 seconds other take 15 (datasheet specifies
10).
Flash erasing times
Feb 05, 2008
4 Replies
10).
I wouldn't expect much effect as a strict function of age, but I would expect that as the part is subjected to many erase cycles, they would start to take longer.
I think manufacturing variation between lots could account for quite a bit of variation.
But I'm not an expert on this stuff.
Be careful with datasheets. Is 10 sec specified as guaranteed maximum erase time at a specific Vdd and temperature or is 10 the nominal?
Rich Webb Norfolk, VA
Yes
I'll take it the one's with erase times of 15+ seconds are probably coming to the end of their life.
Not necessarily. If they don't spec a guaranteed maximum erase time, there's probably a reason. A time of 15 secs could very well be within the process variation for a part right off the manufacturing floor.
Rich Webb Norfolk, VA
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