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Date: Sun, 18 Jan 2015 11:04:41 +0100
From: Florian Teply <usenet AT teply DOT info>
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] HIDDEN PINS IN A SYMBOL
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Am Sat, 17 Jan 2015 13:20:45 -0500
schrieb Jason White <whitewaterssoftwareinfo AT gmail DOT com>:

> Well, I know this is not what you are looking for but when I have
> components that have multiple pins that need connected, I just draw
> multiple pins. For instance I recently needed to use a MOSFET in a six
> pin package where four of the pins were connected to the drain. For
> that design I simply drew in the extra pins and although it was ugly
> (See attached image)
> it did work.
> 

Slightly not directly related to symbols, but it always sstrikes me as
odd that some (actually most for that kind of part) manufacturers
decide to use fouer pins for the drain, but only one for the source
terminal. I still have to find an explanation for that which is a bit
more elaborated than "That's the way it is...".
In my understanding, it can't possibly be for series resistance
reasons, and thermal resistance also is pretty unlikely as it would be
so much more convenient if a heat sink could be attached to ground.
Plus, having the bulk of the semiconductor die electricallly connected
to the drain would make the manufacturing process more complicated
(=expensive), which also seems extremely unlikely in a mass market
product. Do you guys have an idea on why that might be?

Best regards,
Florian