SRAM chips

[Ken Stone]

>Some years back I designed and built an analog/digital storage system that
>used a Hitachi HM6116L CMOS static ram, 2K X 8 bits.  This RAM had a
>current draw in the microamp range when deselected, I used a 3.3 farad
>capacitor to supply the 6116 when the circuit was powered down.  Data
>retention was several weeks with this arrangement.  The 6116 is a generic
>part with many second sources.
>
>Terry Michaels

I have a couple 6116 that have been built on daugterboards, complete with a
couple of AAA cells giving 3V standby. These were quite capable of
maintaining information for as long as 10 years without changing the
batteries.  They were based on an eighties Elektor design.

Ken
_______________________________________________________________________
Ken Stone   sasami at blaze.net.au  
Catgirl Paradise <http://www.anime.net/~kens/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>