Re: gEDA-user: footprint for 1.27 mm spacing

[Dan McMahill <dan@mcmahill.net>]

On Tue, Feb 03, 2004 at 11:54:44PM -0800, David Koski wrote:
> 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)"
> 

not all of the packages in the gEDA document have been implemented in
the PCB library yet.

-Dan

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