Re: gEDA-user: footprint for 1.27 mm spacing

[David Koski <david@kosmosisland.com>]

On Tue, 3 Feb 2004 23:40:53 -0500
Dan McMahill <dan@mcmahill.net> wrote:

> On Tue, Feb 03, 2004 at 03:54:02PM -0800, David Koski wrote:
> > I am new to gschem/pcb.  What footprint is used for 1.27mm spacing smt chips?  I
> > see no footprint examples or docs for it.
> > 
> 
> Thats "50 mils" where I come from ;)  I assume you mean the SOIC family?
> See http://www.geda.seul.org/docs/20040111/symbols/node14.html for the
> geda suggested names.  The ~geda library in PCB has things like SO8, SO14,
> etc.

Thanks!  It must be a SO28:

"Small outline SMT packages with more than 20 50 mil spaced pins and 300 mil
total width are called SOn."

But the .65mm spacing doesn't work:

"Metric shrink small outline SMT packages with 0.65 mm spaced pins and 323 mil
total width are called MSSOPn. NOTE: To be confirmed."

sch2pcb produces:

"U7: can't find PCB element for footprint MSSOP28 (value=unknown)"

Regards,
David Koski
david.nospham@KosmosIsland.com
!.nospham