datasheets for 82S21 - Signetics 32x2 SRAM?

[Geoffrey Thomas]

Just catching up with these posts :>)
My old Quarndon cat. gives it as a Write while Read RAM with o/c O/Ps. 32x2.
It has a logic level schematic ( quite small ) if that's any use- I can get
it scanned and enlarged.

Geoff.

----- Original Message -----
From: "Brad Parker" <brad at heeltoe.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Wednesday, September 07, 2005 10:53 PM
Subject: Re: datasheets for 82S21 - Signetics 32x2 SRAM?


>
> Tony Duell wrote:
> >
> >Here's the pinout. I have no idea what some of the signals are for (does
> >it, for example, have separate write-enable inputs for the 2 bits?), but
> >it may be better than nothing.
>
> Thanks - I know the pinout.  I think this ram would allow some sort of
> simultaneous read/write (not dual port, just overlapped) but I don't
> know how it works.
>
> >The NatSemi DM86S21 might be an equivalent, I can find no
> >cross-references to it in other memory databooks, though.
>
> Huh.  I could not find anything on the 86S21, but I don't have national
> books.  Anyone else?
>
> -brad
>
>
>
>
> --
> No virus found in this incoming message.
> Checked by AVG Anti-Virus.
> Version: 7.0.344 / Virus Database: 267.10.18/91 - Release Date: 06/09/05
>
>



-- 
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.371 / Virus Database: 267.13.13/195 - Release Date: 08/12/05