Don't waste your time looking, you won't find
footprints at the JEDEC site. I think their main
mission is to standardize and publish the physical
dimensions of component packages.

The only footprint standards I have seen are:

IPC-SM-782
http://www.ipc.org or

SMTPLUS
http://smtplus.com/landpatternscdrom.htm

I WOULDN'T recommend using manufacturer's suggested
footprints, or your library will quickly become a
nightmare to maintain (with multiple vendors, second
source stuff, complicated naming conventions, etc)
ESPECIALLY not for common stuff that any vendor can
assemble.
But for newer hi-tech or specialized components that
are layout-sensitive, the manufacturer's
recommendations may be good advice that shouldn't be
ignored (yeah, I  know, more trade-offs and
decision-making required, but that's what makes you
guys such damn good designers, right?)

onward thru the fog...
Jack

--- Mitch Morey <[log in to unmask]> wrote:
> Hi James,
>
> I've never got a "footprint" pattern from JEDEC,
> have you? I've gone to
> the JEDEC site to see package dimensions, but I
> never understood them to
> have land patterns or footprints for the packages.
> I've never known them
> to be invloved with the manufacturing side of the
> packages, only the
> packages themselves. Am I wrong? If I am, would
> someone please tell me
> where they hide the footprints?
>
> I think it's great that an organization is finally
> trying to convince
> the manufacturers to "use" a standard package, and
> I'm still hoping IPC
> can convince all us designers to use their land
> pattern standards. We'll
> see. ;)
>
> TIA.
>
> Mitch


__________________________________________________
Do You Yahoo!?
Make international calls for as low as $.04/minute with Yahoo! Messenger
http://phonecard.yahoo.com/

---------------------------------------------------------------------------------
DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF DesignerCouncil.
To set a vacation stop for delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------