Good-morning Peter, There are several companies who advertise the ability to build interposers between various packages and PCB configurations. I found these three in one of my PCB magazines in just a few minutes. Ironwood Electronics at http://www.ironwoodelectronics.com, Logical Systems at http://www.logicalsys.com/, or Emulation Technology at http://www.emulation.com are three choices. There are a lot of other shops that also do this sort of thing. Emulation Technology and Ironwood have been around for a long time. I have not used one of these shops for interposers, we usually build out own when we run into this sort of issue. I have used ET and Ironwood for special sockets and clips for live in-circuit testing. I am sure some other technetters may be able to share their expeiences. Good luck and smooth sailing, Kim Haynes Interface and Clock Products High-Speed Serial Link Applications Texas Instruments, Inc. 214-567-2057 Telephone -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Peter Wong Sent: Wednesday, March 12, 2008 7:01 PM To: [log in to unmask] Subject: [TN] Adapter board/socket for TQFP 176 pin I have a customer whose boards were designed with a 176 pin TQFP with a 0.4 mm lead pitch. Problem is, the parts they specified were 176 pin LQFP with 0.5 mm pitch. I've seen references on TechNet before to companies that can provide adapter boards/sockets to allow us to use these fabs until they get re-designed but I can not recall who they were. I've tried searching the archives with no success. Can anyone help me? Thanks Peter --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------