SOT23 package with 2019.02 |
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jnshah
Advanced User Joined: 21 Jan 2016 Status: Offline Points: 91 |
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Posted: 17 Mar 2019 at 4:51pm |
Is there a footprint naming convention change for SOT23 packages?
When I update any existing package in my library, it asks me to update the footprint name when saving back to library and changes the name. For example, SOT23-3P50_160X90L22X22 changes to SOT23-P50_160X90L22X22. I see that with every SOT23 package in my library (20+ items). I have not tried others.
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Tom H
Admin Group Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5718 |
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The new IPC-7351 Land Pattern Naming Convention pushed the Pin Qty from the end of the Footprint Name to the beginning.
So, SOT23-3 or SOT23-5 or SOT23-6 or SOT23-8 is the common pin qty of the SOT23. The P95, P65 & P50 is the Pin Pitch - 0.95 mm or 0.65 mm or 0.50 mm pitch. |
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jnshah
Advanced User Joined: 21 Jan 2016 Status: Offline Points: 91 |
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Hi Tom,
Thanks for the quick reply. Just so that I am clear, SOT23-3P50 now becomes SOT23-P50? The "3" before the P50 goes away? The new footprint name I am getting is "SOT23-P65_210X110L32X32" and it does not have the pin number in it at all. How do I tell if it is a 3P vs 6P vs 8P? Is this change new to 2019.02? |
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Tom H
Admin Group Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5718 |
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The Land Pattern Footprint Naming convention was updated in Library Expert V2017.
Look in this folder on your computer - C:\Program Files (x86)\PCB Libraries\Library Expert 2019\Documents You will see these very important documents -
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zetski210
New User Joined: 23 Jun 2016 Status: Offline Points: 2 |
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Hi Tom,
I'm also seeing the pin number disappear from the SOT23 parts in v2019. This means that the same land pattern is called for either 3, 5 or 6 pin parts with the same geometry. I cannot use this approach as my CAD library wants to over-write the files (as they are all the same name) and my CAD package will fail as there is the same land pattern for 3/5/6 pin parts... Reverting back to v2018 until this is corrected. |
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Tom H
Admin Group Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5718 |
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The SOT23 Land Pattern Footprint Name has been corrected in V2019.02.
Download here - www.pcblibraries.com/downloads |
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zetski210
New User Joined: 23 Jun 2016 Status: Offline Points: 2 |
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Thanks Tom.
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