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'[EE]: FRAM replacement for EEPROM'
2001\05\12@191511 by mike

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I've just found this
http://www.ramtron.com/products/appntotes.htm
They claim their FRAM can be a drop in replacement for EEPROM
but with faster access times and a 10 year data retention time.
your comments appreciated.
cheers Mike W

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2001\05\12@194420 by asena

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> I've just found this
> http://www.ramtron.com/products/appntotes.htm
> They claim their FRAM can be a drop in replacement for EEPROM
> but with faster access times and a 10 year data retention time.
> your comments appreciated.
> cheers Mike W
>

I've used some of those.

They're fantastic!!

The write speed is equal to the bus speed, so you have a complete RAM, but still manage to
keep your data!

And the I2C bus is even better!

If you query the manufacturer about the FRAM's, you'll maybe get a couple of samples free. I got
them this way, in the UK. (mention that you're doing somekind of project...bla...bla...).

If you want more comments on these memories, i know that HAM people, in the TAPR E-PIC
Sig group, use them a lot.


Hope it was helpfull.
cheers


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Antonio Sergio Sena     CT2GPW
spam_OUTasenaTakeThisOuTspambigfoot.com
+ 44.785.5917270
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BEng Electrical & Electronic Engineering
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Homepage: http://www.qsl.net/ct2gpw
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2001\05\12@194437 by David VanHorn

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At 12:09 AM 5/13/01 +0100, Mike W wrote:
>I've just found this
>http://www.ramtron.com/products/appntotes.htm
>They claim their FRAM can be a drop in replacement for EEPROM
>but with faster access times and a 10 year data retention time.
>your comments appreciated.
>cheers Mike W

It's everything they claim it is. :)
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2001\05\12@194836 by Byron A Jeff

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>
> I've just found this
> http://www.ramtron.com/products/appntotes.htm
> They claim their FRAM can be a drop in replacement for EEPROM
> but with faster access times and a 10 year data retention time.
> your comments appreciated.

Be aware that FRAM has destructive reads, so there is a maximum number of times
you can write/read a location. Something like 10 billion allowed. While this
seems like a lot, it's easily exceeded if you read a location on the order of
10000 to 100000 times a second.

BAJ

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2001\05\12@195045 by David VanHorn

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>
>If you want more comments on these memories, i know that HAM people, in
>the TAPR E-PIC
>Sig group, use them a lot.

http://www.hamhud.net
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2001\05\12@221405 by Tim Hamel

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In a message dated 5/12/01 4:45:06 PM Pacific Daylight Time,
.....asenaKILLspamspam@spam@BIGFOOT.COM writes:


> If you query the manufacturer about the FRAM's, you'll maybe get a couple of
> samples free. I got
> them this way, in the UK. (mention that you're doing somekind of
> project...bla...bla...).
>

I asked for info about the SPI/I2C FeRAMs and they sent me 4 of each (24C64
and 25640)! They also sent this AWESOME CD shaped like a umm...uhh...a CD
with two "sides" chopped off. It's about 3" in diameter.

I managed to rig up the SPI one to my parallel port and read/write data.
There's a gotcha...if you do incremental writes, don't write the incremented
address each time; really messed me up.

Regards,

Tim Hamel

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