No Support for DFN IC's?
Printed From: PCB Libraries Forum
Category: PCB Footprint Expert
Forum Name: Questions & Answers
Forum Description: issues and technical support
URL: https://www.PCBLibraries.com/forum/forum_posts.asp?TID=1943
Printed Date: 07 Oct 2024 at 11:26am
Topic: No Support for DFN IC's?
Posted By: Matthew Lamkin
Subject: No Support for DFN IC's?
Date Posted: 15 Aug 2016 at 8:28am
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Hello, IPC-DRM-18H page 60 has DFN (Dual Flat No Lead) packages. For an IC such as http://pdfserv.maxim-ic.com/package_dwgs/21-0137.PDF" rel="nofollow - pdfserv.maxim-ic.com/package_dwgs/21-0137.PDF with multiple pads either side these are not within the LEP. SON with tab seems the nearest, is this the correct one to use for this package please? Also is there any sort of list that says which LEP family to use for which known as family? Thank you Matthew |
Replies:
Posted By: Tom H
Date Posted: 15 Aug 2016 at 9:37am
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This package is not a DFN (although that is what the Mfr. calls it). JEDEC and IPC call this a SON w/Tab. The main documents that explains all the package names and solder joint goals are here - http://www.pcblibraries.com/downloads" rel="nofollow - www.pcblibraries.com/downloads Download "Surface Mount Component Families" Note: there was a major update to this document this last weekend and we're all waiting for it to post today. It has 10 additional pages of information and the new IPC-7351C (Proposed) solder joint goal tables and updated land pattern images. ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - X - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |
Posted By: Matthew Lamkin
Date Posted: 16 Aug 2016 at 12:44am
Cheers Tom,  The correct one was chosen then, I'll scribble on my IPC-DRM-18H book.  |
Posted By: Matthew Lamkin
Date Posted: 18 Aug 2016 at 6:47am
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Tom is the latest pad naming convention document also available? I cannot find it on the downloads page. |
Posted By: Tom H
Date Posted: 18 Aug 2016 at 6:52am
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It's in the "PCB Library Construction Guidelines" section in the Forum - http://www.pcblibraries.com/forum/pcb-library-construction-guidelines_forum30.html%20" rel="nofollow - http://www.pcblibraries.com/forum/pcb-library-construction-guidelines_forum30.html IPC-7351 Pad Stack Naming Convention Along with other library construction documents. ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - X - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |
Posted By: Nick B
Date Posted: 18 Aug 2016 at 7:01am
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Also on the "Downloads" page, look for the "Surface Mount Components" button. Date updated (as of this point) is 8/15/2016. ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - X - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |
Posted By: Matthew Lamkin
Date Posted: 18 Aug 2016 at 8:12am
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Cheers Tom, is it not available as a PDF anywhere? Nick, its not in the surface mount document - that's component naming - not padstack naming. I really do need to gather all these docs and make a folder full - trying to find PDF's all the time is very time consuming. To hell with the idea of a paperless office - I cant doodle on that :) |
Posted By: Nick B
Date Posted: 18 Aug 2016 at 2:22pm
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PDF version is now available at http://www.PCBLibraries.com/Downloads" rel="nofollow - http://www.PCBLibraries.com/Downloads ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - X - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |