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TO254P1419X457-3_4 or TO508P1419X457-3

Printed From: PCB Libraries Forum
Category: PCB Footprint Expert
Forum Name: Questions & Answers
Forum Description: issues and technical support
URL: https://www.PCBLibraries.com/forum/forum_posts.asp?TID=734
Printed Date: 22 Nov 2024 at 11:46am


Topic: TO254P1419X457-3_4 or TO508P1419X457-3
Posted By: jameshead
Subject: TO254P1419X457-3_4 or TO508P1419X457-3
Date Posted: 05 Dec 2012 at 6:59am
I wondered generally how people treat a DPAK where pin 2 has been cut off such as:

http://www.onsemi.com/pub_link/Collateral/936-03.PDF" rel="nofollow - http://www.onsemi.com/pub_link/Collateral/936-03.PDF

Do you enter it as:

TO254P1419X457-3_4

or

TO508P1419X457-3

?

I've been using TO254P1419X457-3_4 since I'm looking for the pitch of 2.54mm which is what the dimensioned drawing shows.


Replies:
Posted By: Tom H
Date Posted: 05 Dec 2012 at 7:10am
If you "Hide" pin 2 then the Pin Qty in the Footprint Name would be -3_4
The last pin number in the final footprint will always appear last.
So when you "Hide" Pin-2 you have a 3-Pin package and Pin-4 is the last Pin number.
 
If you "Delete" pin 2 then the Pin Qty in the Footprint Name would be -4_3
This means you have 3-Pins in a 4-pin package and Pin-3 is the last Pin number.
 

Posted By: jameshead
Date Posted: 05 Dec 2012 at 7:17am
Okay, thanks.

I'd only ever want to use the remove.


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