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Flash erasing times

Discussion in 'Electronic Components' started by Richard Hutchinson, Feb 5, 2008.

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  1. 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).
     
  2. Eric Smith

    Eric Smith Guest

    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.
     
  3. Rich Webb

    Rich Webb Guest

    Be careful with datasheets. Is 10 sec specified as guaranteed maximum
    erase time at a specific Vdd and temperature or is 10 the nominal?
     
  4. is 10 the nominal?

    Yes


    I'll take it the one's with erase times of 15+ seconds are probably coming
    to the end of their life.
     
  5. Rich Webb

    Rich Webb Guest

    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.
     
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