Re: [Gumstix-users] MMC3 not working?

[Ned F. <nfo...@wh...>]

On 05/10/2010 04:55 PM, Krishna Sagiraju wrote:
> TXS0206 is only available in BGA package and I can't use that part
> because of trace width restrictions from my pcb manufacturer. I guess
> I'm pushing my luck here but, are there any other parts that would
> work with mmc3 on omap3? Or is there any techniques for routing the
> pings on TXS0206 with 5mil traces?

I can't find any layout guidelines for that package at TI (they must be
there someplace). It looks like the inner 6 pins, at least, will need to
use via-in-pad.  You will have to work with the board fabricator and the
assembler to be sure you get the right fill and surface finish for the
vias and pads.  Basically, this puts the fanout for those pins directly
on the next inner layer of the board. You'll need at least a 4 layer
board for that part.

-- 
Ned Forrester                                       nfo...@wh...
Oceanographic Systems Lab                                  508-289-2226
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