PCB Libraries Forum : 32L PLCC Dimension D2 Query https://www.PCBLibraries.com/forum/ Mon, 06 Apr 2026 00:43:54 +0000 Tue, 13 May 2014 05:43:04 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=1336 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[32L PLCC Dimension D2 Query : yes, but this dim didn&#039;t...]]> https://www.PCBLibraries.com/forum/32l-plcc-dimension-d2-query_topic1336_post5300.html#5300 Author: jameshead
Subject: 1336
Posted: 13 May 2014 at 5:43am

yes, but this dim didn't look obvious to me at first so I was checking particulary because of the absence of an "E2" dimension.
]]> Tue, 13 May 2014 05:43:04 +0000 https://www.PCBLibraries.com/forum/32l-plcc-dimension-d2-query_topic1336_post5300.html#5300 <![CDATA[32L PLCC Dimension D2 Query : You mention that the dimensional...]]> https://www.PCBLibraries.com/forum/32l-plcc-dimension-d2-query_topic1336_post5299.html#5299 Author: Tom H
Subject: 1336
Posted: 13 May 2014 at 5:37am

You mention that the dimensional picture is too small to make out the details.

Did you know that you can click & drag and stretch the windows to make the picture super big or small.  


]]> Tue, 13 May 2014 05:37:08 +0000 https://www.PCBLibraries.com/forum/32l-plcc-dimension-d2-query_topic1336_post5299.html#5299 <![CDATA[32L PLCC Dimension D2 Query : Thanks Tom, that&#039;s what I&#039;d...]]> https://www.PCBLibraries.com/forum/32l-plcc-dimension-d2-query_topic1336_post5296.html#5296 Author: jameshead
Subject: 1336
Posted: 13 May 2014 at 12:42am

Thanks Tom, that's what I'd thought but on screen it's a bit difficult to make out, even on a 24 inch monitor!

This particular PLCC though has a different number of pins along one side then the other, so I would expect to have an E2 as well as a D2 dimension to be entered.

In this case D2 is GE on the datasheet, being 10.41 mm nominal.

What's missing in Library Expert is an E2 to match up with GD on the datasheet, being 12.95 nominal, or are you taking care of that internally in the software?

I guess you could work out E2 by knowing D2, D1 and D, and then knowing E and E1, and workout what E2 could be?

]]> Tue, 13 May 2014 00:42:34 +0000 https://www.PCBLibraries.com/forum/32l-plcc-dimension-d2-query_topic1336_post5296.html#5296 <![CDATA[32L PLCC Dimension D2 Query : D2 is the dimension from the center...]]> https://www.PCBLibraries.com/forum/32l-plcc-dimension-d2-query_topic1336_post5293.html#5293 Author: Tom H
Subject: 1336
Posted: 12 May 2014 at 7:52pm

D2 is the dimension from the center of the J-Lead to the center of the J-Lead. ]]> Mon, 12 May 2014 19:52:57 +0000 https://www.PCBLibraries.com/forum/32l-plcc-dimension-d2-query_topic1336_post5293.html#5293 <![CDATA[32L PLCC Dimension D2 Query : Using 2014.02 to create a Winbond...]]> https://www.PCBLibraries.com/forum/32l-plcc-dimension-d2-query_topic1336_post5288.html#5288 Author: jameshead
Subject: 1336
Posted: 12 May 2014 at 7:42am

Using 2014.02 to create a Winbond 32L PLCC, datasheet here:

http://www.winbond.com/NR/rdonlyres/A0AC3708-50FF-4854-853A-92DC4CB01B37/0/W39L040A.pdf

The Surface Mount calculator has a D2 dimension but it's a bit unclear what this dimension is meant to be in the screen picture, other than it being a required entry.

I wondered if it was meant to be the dimension GE that's shown on the Winbond datasheet?

If so, there's no corrisponding E2 in the opposite plane to be equivilent to GD in Library Expert.

]]> Mon, 12 May 2014 07:42:35 +0000 https://www.PCBLibraries.com/forum/32l-plcc-dimension-d2-query_topic1336_post5288.html#5288