Re: More ZipGS Q's: The RAM

[dempson@actrix.gen.nz (David Empson)]

David Empson <dempson@actrix.gen.nz> wrote:

> Martin Gruen <mgruen@shell.fastlane.net> wrote:
> 
> > 1)  I called AMT international today and asked for a price on the 32 kb x
> > 8 sram at 15ns.  I was asked which kind (okay the next bit is vague I
> > didn't understand much with the guy's accent).  The dip at 3.3v or the 15
> > dip he said the difference is the length of the pins.  Anyone understand
> > this and can clue me in?
> 
> I can tell you that you need 5V static RAM, not 3.3V.  I'm not sure what
> this "15 dip" is supposed to mean, unless it is a way of referring to
> the width of the chip.
> 
> The RAM chips used on the ZIP are "standard" or "wide" DIP, which is
> about 3/10 of an inch wide (300 thou, in electronic layout terminology).
> 
> You can also get some chips in a "narrow" or "skinny" DIP package, which
> is half the width but has the same pin spacing (and length).  This is
> 15/100 of an inch wide (150 thou).

Correction: those widths should be 6/10 (0.6) and 3/10 (0.3) inches
respectively.  Serves me right for posting so late.

-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand