Yo, Bitch!

Paradigm PDM41256SA20P http://www.prdm.com/products.html

Hitachi HM3-65764H-5
     unsure, but appears to be an old, discontinued Hitachi PSRAM - 64 *
7, requires a periodic refresh.  But 64 * 7 doesn't really make lots of
sense.  Not on Hitachi's web page, but similar part numbers for PSRAM are
(i.e. HS658128).

Hope this helped!

jason


Taco Bell Employee "Keith Causey" Wanted to Add the Following to the
Beans...

>Hey Guys,
>
>    I have a bunch of middle-aged motherboards (386 & old 486) that have
>these 28 pin 300 mil dip packages and no datasheets. I've searched
>extensively for datasheets on the web to no avail. Typical part numbers
>are PDM41256SA20P from PARADIGM; HM3-65764H-5, etc... I'd really like to
>hook them up to PICs for external memory but I don't know how they work.
>Anybody familiar with these plentiful but mysterious chips?
>
>                                                Keith Causey
>