[PCB_FORUM] Re: sch4pins-pcb5pins

Hi Sam,

The number of pins on the footprint should be the same
as the number of pins on part in the schematic.
In your case you need to add NC property on the
schematic part. The value of the property should be
the number of the pin ( same is on the foorprint)

--- sjcharles@xxxxxxx wrote:

> Shirley.
> normally i show all pins whether the are NC or
> mounting for socket type connector. I just got a sch
> which won't package and before i give it back i
> wanted to have my answer straight about whether or
> not the NC pin needs to be part of the symbol.
> Thanks again
> Sam
> > 
> > From: "Bolman, Shirley H"
> <shirley.h.bolman@xxxxxxxxx>
> > Date: 2005/11/04 Fri PM 05:03:12 EST
> > To: <icu-pcb-forum@xxxxxxxxxxxxx>
> > Subject: [PCB_FORUM] Re: sch4pins-pcb5pins
> > 
> > Normally most software is not happy if all of the
> physical pins are not
> > identified in
> > a logic symbol. What is the 5th pin on the allegro
> footprint for? If it
> > is a signal or
> > ground pin then the part in the schematic should
> be updated. If it is
> > just a mechanical
> > mounting hole and not a "connect" pin then, there
> shouldn't be any
> > problem. With allegro
> > a mechanical hole is not considered a "pin" and
> they probably should be
> > NPTH.
> > 
> > The same holds true if it is a surface mount "hold
> down" pad that has no
> > electrical connection.
> > It must be added as mechanical and not connect.
> Doing an inquire on the
> > 5th pin in allegro
> > should tell you what kind of a pin/pad it is.
> > 
> > Shirley in Oregon
> > 
> > -----Original Message-----
> > From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
> > [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On
> Behalf Of
> > sjcharles@xxxxxxx
> > Sent: Friday, November 04, 2005 12:37 PM
> > To: icu-pcb-forum@xxxxxxxxxxxxx
> > Subject: [PCB_FORUM] sch4pins-pcb5pins
> > 
> > Group: In orcad capture I have a four pin part and
> in allegro i have a 5
> > pin part. Are there ways to make this work? In the
> past I've always made
> > the sch part and pcb part to have equal number of
> pins.
> > 
> > Sam
> > 
> >
>
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