At 16:14 19.07.02 +0200, you wrote:
>In my next Design i am planning to use the Cypress CY62157CV33 witch comes
>in a FBGA BA48F Footprint.
>
>What are the recomendations for a footprint ? The Datasheet does not give a
>hint it only tells me where the "balls" are but not what diameter the top
>layer pads should have. the balls are 0.3mm diameter. what should the
>correct dogbone look like ?

Have you tried to ask the supplier of the part? I haven't often and had 
different success. Some have nothing, some very detailed drawings (e.g. 
Murata). Nobody knows how they are not in the datasheet!

Edi Im Hof


>Is there any doc avail that explains how the right footprint for a FBGA
>should look like ?
>
>Any help is welcome
>
>Dipl.-Ing. (FH) Michael Schmitt
>Baumer Ident GmbH
>Entwicklung / Development Department
>Hertzstr. 10
>D-69469 Weinheim
>Deutschland / Germany
>Tel. +49 (0) 6201 9957 - 30
>Fax. +49 (0) 6201 9957 - 99
>E-Mail : [EMAIL PROTECTED]
>Web: <http://www.baumerident.com/>
>
>
>************************************************************************
>* Tracking #: 2B7AD000EEDB4F428A043830770F61CDEC774054
>*
>************************************************************************



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