gEDA-user: Is it possible to route through ...

[gene <carzrgr8@xxxxxxxxxxxxx>]

1. A 0.80mm pitch TSOP?  If I have the math right, 0.80 pitch = 31.4 
mil. Pin width = 0.375mm, = 14.7 mil.  So the clearance between pins is 
pinPitch - pinWidth,
= 31.4 - 14.7
= 16.7 mil
Assuming equal line/space, I can fit a maximum trace of 16.7 / 3 = 5.5mil

That assumes my pads are precisely the width of the pin - which doesn't 
seem to be a very good idea.

So is this possible?  I'm sure I've seen this done on boards at work.

2. Same question, but for a 0.50mm pitch part.  Tougher fit, I think.

Like I said, I'm pretty sure I've seen this done before, especially for 
a bus connecting memory devices together.

gene


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