[sdiy] SRAM like 5101

[ChristianH]

Hi Juergen,

haven't heard of separate I/O RAMs for ages. Our friend Reichelt still
offers 2114 RAMs, which are from those ages. His description says DRAM,
but those are static. However I'm not sure if they have separate I/O.
Since I'm at the office, I don't have an ancient data book at hand right
now. And it's most probably not CMOS, which seems to be the core
requirement in a PS-3200...

Is this a repair job, or is it for your clone project? 
In that case it's probably better to do a redesign, in order to use
something like 6116s (2kx8). Of course it will depend on the surrounding
circuit if this is easily feasible. IMHO, adding a couple of 'LS245
3state buffers would be better than relying on obsolete parts, but gate
timing may require some thinking.

Gee, it's hard to imagine JH designing digital circuits :-)

regards
Christian


On Thu, 11 Apr 2002 14:20:45 +0000 (UTC) jhaible wrote:

> Are there still SRAMs with separate data input and data output pins ?
> The PS-3200 used 5101s (obsolete, and needed several of these because
> of their small memory size). 
> 
> I'm looking for something like 512 x  8bit (or slightly larger), separate DI
> and DO pins.
> I figure this must be a rather big package size (8 adress pins + 16 data pins
> alone),
> so I'm not sure something like that even exists. (Maybe they cancelled thar
> separate
> DI / DO interface when memories got bigger ?)
> 
> Any pointers ?
> 
> JH.