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DFN "L" "N" "M" values

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=1616
Printed Date: 18 Nov 2024 at 8:32pm


Topic: DFN "L" "N" "M" values
Posted By: lalexman
Subject: DFN "L" "N" "M" values
Date Posted: 23 Mar 2015 at 1:23pm
On a 2 lead DFN it looks like there are no values you can enter for the toe,side, and heel ? Is this correct ? Also the default values for density level for the Flat No-Lead Side length <1.6MM are all the same for "L" "N" "M". Is this correct ?


Replies:
Posted By: Tom H
Date Posted: 23 Mar 2015 at 1:31pm
On all "Bottom Only" terminals, LGA, CGA, BGA, 2, 3, 4 pin DFN, PSON, PQFN there is no Toe, Heel or Side. There is a periphery, meaning that whatever the value is, it's the same on all sides.
 
And once a component package is less than 1.6 mm the 3-tier system is thrown out and only one pad size is preferred.
 


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Posted By: lalexman
Date Posted: 23 Mar 2015 at 1:33pm
Thanks Tom.


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