SOIC Missing Polarity Marker
Printed From: PCB Libraries Forum
Category: Libraries
Forum Name: 3D Models
Forum Description:
URL: https://www.PCBLibraries.com/forum/forum_posts.asp?TID=2978
Printed Date: 30 Oct 2025 at 9:16am
Topic: SOIC Missing Polarity Marker
Posted By: phil.holden
Subject: SOIC Missing Polarity Marker
Date Posted: 07 Sep 2021 at 11:30am
| Every STEP I output in the SOIC family has the pin 1 marker missing from the model. |
Replies:
Posted By: Tom H
Date 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.  ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - X - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |
Posted By: phil.holden
Date Posted: 07 Sep 2021 at 11:45am
| Thanks Tom. I hadn't noticed this. |
Posted By: Tom H
Date Posted: 07 Sep 2021 at 11:47am
|
It's one of the ways to differentiate between mil pitch and metric pitch SO's. ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - X - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |
Posted By: phil.holden
Date Posted: 07 Sep 2021 at 11:48am
|
Good point. Something I shall pass on to my colleagues. |