It looks like section 9, and perhaps section 9.1 specifically, of IPC-SM-782A has the information you need, if they are the standard 1.27mm (or .05 in) pitch. Other sub sections of section 9 deal with different pitches of SO IC packages. -----Original Message----- From: Sefika Ozkal [mailto:[log in to unmask]] Sent: November 26, 2002 8:32 AM To: [log in to unmask] Subject: [TN] Footprint Hello, I have a problem about plastic small outline package type. I could not find the recommended footprint for two devices which are having SO8 and SO20 packages. Is there any one who knows to calculate the footprint values? Or, is there a standart I could use to solve this problem? I could not find aanything from IPC-SM-782A. Am I in a wrong way? I would be waiting for your answer. Best Regards, Sefika Özkal Electronics Engineer ASELSAN Inc. Microelectronics, Guidance and Electro-Optics Division Electronic Design Address : P.O. Box:30, Etlik 06011 Ankara,TURKEY Tel :+90 312 847 53 00 Ext:4698 Fax :+90 312 847 53 20 e-mail : [log in to unmask] --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/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 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/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 -----------------------------------------------------