PCB Libraries Forum : SOIC Missing Polarity Marker https://www.PCBLibraries.com/forum/ Wed, 15 Apr 2026 07:08:35 +0000 Tue, 07 Sep 2021 11:48:53 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=2978 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[SOIC Missing Polarity Marker : Good point. Something I shall...]]> https://www.PCBLibraries.com/forum/soic-missing-polarity-marker_topic2978_post11869.html#11869 Author: phil.holden
Subject: 2978
Posted: 07 Sep 2021 at 11:48am

Good point. Something I shall pass on to my colleagues.

]]> Tue, 07 Sep 2021 11:48:53 +0000 https://www.PCBLibraries.com/forum/soic-missing-polarity-marker_topic2978_post11869.html#11869 <![CDATA[SOIC Missing Polarity Marker : It&#039;s one of the ways to differentiate...]]> https://www.PCBLibraries.com/forum/soic-missing-polarity-marker_topic2978_post11868.html#11868 Author: Tom H
Subject: 2978
Posted: 07 Sep 2021 at 11:47am

It's one of the ways to differentiate between mil pitch and metric pitch SO's. 

]]> Tue, 07 Sep 2021 11:47:04 +0000 https://www.PCBLibraries.com/forum/soic-missing-polarity-marker_topic2978_post11868.html#11868 <![CDATA[SOIC Missing Polarity Marker : Thanks Tom. I hadn&#039;t noticed...]]> https://www.PCBLibraries.com/forum/soic-missing-polarity-marker_topic2978_post11867.html#11867 Author: phil.holden
Subject: 2978
Posted: 07 Sep 2021 at 11:45am

Thanks Tom. I hadn't noticed this. ]]> Tue, 07 Sep 2021 11:45:14 +0000 https://www.PCBLibraries.com/forum/soic-missing-polarity-marker_topic2978_post11867.html#11867 <![CDATA[SOIC Missing Polarity Marker : The 1.27 mm (50 mil) pin pitch...]]> https://www.PCBLibraries.com/forum/soic-missing-polarity-marker_topic2978_post11866.html#11866 Author: Tom H
Subject: 2978
Posted: 07 Sep 2021 at 11:43am

The 1.27 mm (50 mil) pin pitch SOIC has a Body Chamfer all along the Pin 1 Side. 



]]> Tue, 07 Sep 2021 11:43:35 +0000 https://www.PCBLibraries.com/forum/soic-missing-polarity-marker_topic2978_post11866.html#11866 <![CDATA[SOIC Missing Polarity Marker : Every STEP I output in the SOIC...]]> https://www.PCBLibraries.com/forum/soic-missing-polarity-marker_topic2978_post11865.html#11865 Author: phil.holden
Subject: 2978
Posted: 07 Sep 2021 at 11:30am

Every STEP I output in the SOIC family has the pin 1 marker missing from the model.]]> Tue, 07 Sep 2021 11:30:45 +0000 https://www.PCBLibraries.com/forum/soic-missing-polarity-marker_topic2978_post11865.html#11865