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From: DaveC on 9 Jun 2010 16:28
> http://www.fairchildsemi.com/packaging/

According to this source, the same package (listed in the TI datasheet as
"SOP") might a large SOIC-20:

<http://www.fairchildsemi.com/products/logic/packaging/soic20.html>

Am I the only one confused?

From: Michael A. Terrell on 9 Jun 2010 16:49

DaveC wrote:
>
> > http://www.fairchildsemi.com/packaging/
>
> According to this source, the same package (listed in the TI datasheet as
> "SOP") might a large SOIC-20:
>
> <http://www.fairchildsemi.com/products/logic/packaging/soic20.html>
>
> Am I the only one confused?


Probably. :)

SOP = Small Outline Package

SOIC = Small Outline IC


--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.
From: James Sweet on 9 Jun 2010 17:00
DaveC wrote:
>> http://www.fairchildsemi.com/packaging/
>
> According to this source, the same package (listed in the TI datasheet as
> "SOP") might a large SOIC-20:
>
> <http://www.fairchildsemi.com/products/logic/packaging/soic20.html>
>
> Am I the only one confused?
>


That's another problem, there are special package types that are called
different things depending on the manufacture.

I've recently worked on some designs around TI chips in their "PowerPAD"
packages which are SOIC and SSOP equivalent but with an exposed metal
pad under the die, and of course different names. I've gone to just
ignoring all the packages included in the PCB software and drawing my
own from the datasheet of each part I use, it's less hassle in the long run.
From: WangoTango on 9 Jun 2010 17:31
In article <0001HW.C8352BB000501E40B01AD9AF(a)news.eternal-september.org>,
invalid(a)invalid.net says...
> I've been searching the net for a comprehensive list of drawings of IC
> packages, specifically, all things "SO" (ie, SO, SOP, TSOP, SSOP, TVSOP,
> etc.). What does come up are lists of packages, but no drawings.
>
> I need to have dimensions listed as well, similar to what is typically
> provided in datasheets.
>
> Thanks.
>
>
This is pretty good :

http://www.latticesemi.com/lit/docs/package/pkg.pdf

From: Lostgallifreyan on 9 Jun 2010 17:32
James Sweet <jamesrsweet(a)gmail.com> wrote in
news:huovdv$ie3$2(a)news.eternal-september.org:

> I've gone to just
> ignoring all the packages included in the PCB software and drawing my
> own from the datasheet of each part I use, it's less hassle in the long
> run.
>
>

I agree, I do that too. I collect them slowly and reuse them. Considering SMT
is full of 'standards' it's amazing how there are so many, and some so loose,
that there might as well not be any.

When I saw Baron's post I saw pretty much the same thing I was going to say
when I first saw the original post. I hadn't replied, because I'd hoped that
the standards were adequately adhered to, and that someone who knows far more
than I do might point out a definitive source, but most replies here seem to
suggest that only going to the source of the part to be used is going to get
viable data for it. Maybe not even then.

Sometimes I get the bright light, the maginfier, the digital vernier scale,
and measure the damn things myself! That way I KNOW it fits.
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