PCB Libraries Forum : SMD Crystal Naming Convention https://www.PCBLibraries.com/forum/ Tue, 21 Apr 2026 06:14:28 +0000 Tue, 21 Feb 2017 12:49:34 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=2080 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[SMD Crystal Naming Convention : hmm, there&#039;s a difference...]]> https://www.PCBLibraries.com/forum/smd-crystal-naming-convention_topic2080_post8619.html#8619 Author: BennsPCB
Subject: 2080
Posted: 21 Feb 2017 at 12:49pm

hmm, there's a difference in common sense and Mentor sense.
Why make the simple hard, when you can make it impossible. Wink
]]> Tue, 21 Feb 2017 12:49:34 +0000 https://www.PCBLibraries.com/forum/smd-crystal-naming-convention_topic2080_post8619.html#8619 <![CDATA[SMD Crystal Naming Convention : We did mention to the IPC land...]]> https://www.PCBLibraries.com/forum/smd-crystal-naming-convention_topic2080_post8573.html#8573 Author: Tom H
Subject: 2080
Posted: 07 Feb 2017 at 8:07am

We did mention to the IPC land pattern committee, but they are trying to introduce a brand new JEDEC naming convention for the next release.

PCB Libraries, Inc. will be rejecting the new JEDEC naming proposal as it's 100% different and complex and only one committee member from Mentor Graphics is promoting this major change.

]]> Tue, 07 Feb 2017 08:07:23 +0000 https://www.PCBLibraries.com/forum/smd-crystal-naming-convention_topic2080_post8573.html#8573 <![CDATA[SMD Crystal Naming Convention : Thanks for the explanation Tom!I...]]> https://www.PCBLibraries.com/forum/smd-crystal-naming-convention_topic2080_post8570.html#8570 Author: BennsPCB
Subject: 2080
Posted: 07 Feb 2017 at 1:15am

Thanks for the explanation Tom!

I do see the point of using this measure in the footprint naming, and perhaps this should be suggested to the IPC guys.

Cheers,
/Benn
]]> Tue, 07 Feb 2017 01:15:15 +0000 https://www.PCBLibraries.com/forum/smd-crystal-naming-convention_topic2080_post8570.html#8570 <![CDATA[SMD Crystal Naming Convention : For &#034;Under-Body Outward L&#034;...]]> https://www.PCBLibraries.com/forum/smd-crystal-naming-convention_topic2080_post8565.html#8565 Author: Tom H
Subject: 2080
Posted: 06 Feb 2017 at 9:08am

For "Under-Body Outward L" terminal leads, there are 3 dimensions for pad pattern calculation and they are highlighted with a Blue dot and the Note says "Enter 2 of the 3 optional dimensions. Different combinations may result in a slightly different footprint size".
  • D
  • D2
  • L
The Land Pattern Name reflects which 2 of these 3 options you selected.

Note: if you enter all 3 dimensions, the resulting land pattern may be too large due to the tolerances of all 3 values.


]]> Mon, 06 Feb 2017 09:08:32 +0000 https://www.PCBLibraries.com/forum/smd-crystal-naming-convention_topic2080_post8565.html#8565 <![CDATA[SMD Crystal Naming Convention : Hi guys,the naming of Crystal...]]> https://www.PCBLibraries.com/forum/smd-crystal-naming-convention_topic2080_post8564.html#8564 Author: BennsPCB
Subject: 2080
Posted: 06 Feb 2017 at 4:01am

Hi guys,

the naming of Crystal SMD footprint in LE differs from B and proposed C versions of 7351 doc.

from (proposed) IPC-7351C:
Crystals (2 leads) ................................XTAL + Body Length X Width X Height + L Lead Length X Width

from LE Pro:
XTAL1150X490X350D1300L416X6 4N

I guess the "D1300" is a kind of  "toe to toe" nominal dimension.
Where can I find this difference/addition documented?

Cheers,
/Benn
]]> Mon, 06 Feb 2017 04:01:31 +0000 https://www.PCBLibraries.com/forum/smd-crystal-naming-convention_topic2080_post8564.html#8564