PCB Libraries Forum : how to use the SMD reference calculator? https://www.PCBLibraries.com/forum/ Fri, 26 Jun 2026 19:26:06 +0000 Thu, 05 Nov 2015 09:24:53 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=1787 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[how to use the SMD reference calculator? : The purpose of the reference calculator...]]> https://www.PCBLibraries.com/forum/how-to-use-the-smd-reference-calculator_topic1787_post7318.html#7318 Author: Jeff.M
Subject: 1787
Posted: 05 Nov 2015 at 9:24am

The purpose of the reference calculator is to help understanding the IPC land pattern calculation as set forth in the IPC-7351 publication.  L, S, T and W are terminal dimensions provided by the component manufacturer.  C, X and Y are the dimensions of the calculated land pattern.
You should refer to chapter 3 of the publication for a full explanation.
]]> Thu, 05 Nov 2015 09:24:53 +0000 https://www.PCBLibraries.com/forum/how-to-use-the-smd-reference-calculator_topic1787_post7318.html#7318 <![CDATA[how to use the SMD reference calculator? : Hello,This is probably a very...]]> https://www.PCBLibraries.com/forum/how-to-use-the-smd-reference-calculator_topic1787_post7313.html#7313 Author: fishoutofwater
Subject: 1787
Posted: 04 Nov 2015 at 1:08pm

Hello, 

This is probably a very silly question, but how do I use the SMD reference calculator? 

Is L/S/T/W information gathered from the package data sheet, and C/X/Y the recommended footprint outlines?

Thank you for your help.




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