[gta02-core] Footprint naming (was Re: PMU finished)

Werner Almesberger werner at openmoko.org
Sun Jun 21 01:46:49 CEST 2009

?lvaro Lopes wrote:
>> Why do you call the footprints R0402-H and not just 0402 is there any
>> reason for that?
> OpenMoko schematics have it that way. We can change it later if needed.

We should call 0402 and friends just that.

Beware that also here, the war between the imperial forces and the
metric armies still rages. For a taste of it, look at the last
page of

Whoever cooked up the 0201 (imperial) == 0603 (metric) equivalence
deserves a medal ...

SOT-xxx will also get interesting. There are at least four
numbering schemes in use:

1) "structural": SOT-<size_class>2<pins>, e.g., SOT-323, SOT-523
2) "some standard" (*): SOT-416 et al., heavily used by NXP.
   confusingly also start with "SOT".
3) EIAJ: SC-70, SC-75, etc. pretty common all over the place
4) "crazy vendor": EMT4, SSMini3 (Panasonic), etc.

(*) NXP either say nothing or claim it's their own, but others use
    that naming scheme as well.

So, there's a bit more confusion to resolve.

- Werner

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