Igor wrote (to  Bob) :
>Microchip guarantees one million write cycles to their EEPROM. Isn't enough
>for you ?
>Igor

Ramtron says 10**12 (1 Trillion)  read/write cycles for the FM25C160
device (2K byte). At 5000 operations/second, thats 15 years...

Another device (FM25640, 8 kb) says 10**10 (10 Billion) cycles.
Note that plain reads counts also !
A read from FRAM is internaly a read-rewrite operation, that's why
read counts also.

And, with FRAM, writing is a no-wait-state operation. You can write
as fast as the SPI interface can transfer data (up to 5Mhz in the case
of these two devices).

I'v got four FM25640-P I got from the Ramtron sample service, but havn't
had time to run any test with them yet...

Jan-Erik Soderholm.
S:t Anna Data

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