EPROM erase times and lifespan

Dave McGuire mcguire at neurotica.com
Thu Jan 29 22:54:14 CST 2009

On Jan 29, 2009, at 2:52 PM, Roy J. Tellason wrote:
>> 1) Some EPROMS are "more programmed" than others.
>> Early devices with a fixed proramming time per cell normally are  
>> saturated,
>> and well programmed. Later "intelligent" algorithms would watch  
>> the device,
>> note how much charge was needed to make a 1->0 transition occur in  
>> the
>> cell, add a margin and "your done". Much faster - but depending on  
>> the
>> equipment, sometimes "less programmed".
> I wonder if this has any effect on the longevity of what's stored  
> on them?

   It seems logical that it would.


Dave McGuire
Port Charlotte, FL

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