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 ---------------------------------------------------------------------------------