Core memory emulator using non volatile ram.

[alan at alanlee.org]

Ramtron had most of the patents on Ferroelectric RAM in the past.  
Cypress acquired them many years ago.

New production FRAM is still sold on Digikey - in 5V SOIC packages.  Not 
cheap though:

8K x 8 - $12.72 (qty 1):

https://www.digikey.com/product-detail/en/cypress-semiconductor-corp/FM16W08-SGTR/428-3774-1-ND/6181520

32K x 8 - $19.54 (qty 1):

https://www.digikey.com/product-detail/en/cypress-semiconductor-corp/FM18W08-SGTR/428-3775-1-ND/6181516

Completely non-volatile.  Faster than most SRAM of the day (130ns cycle 
time).  And good for 100+ trillion write cycles and more than a century 
of endurance.

-Alan


On 2018-12-15 05:19, Paul Birkel via cctech wrote:
> Perhaps Cypress FM1808 (32Kx8).  Obsolete, but available on eBay.  SOP
> for a bit of extra challenge!
> 
> -----Original Message-----
> From: cctech [mailto:cctech-bounces at classiccmp.org] On Behalf Of Rod
> G8DGR via cctech
> Sent: Saturday, December 15, 2018 4:22 AM
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: Core memory emulator using non volatile ram.
> 
> I have an idea to produce an MM-8  clone using RAM that acts like core
> when turned off.
> Can anybody suggest a chip that will do this?
> 
> Rod Smallwood
> 
> 
> Sent from Mail for Windows 10