SOT143 Polarity Pin
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=1318
Printed Date: 07 Oct 2024 at 5:26pm
Topic: SOT143 Polarity Pin
Posted By: ejkreiner
Subject: SOT143 Polarity Pin
Date Posted: 23 Apr 2014 at 6:16am
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I am building a SOT143 package and when I calculate the footprint the larger pad for polarity is on Pin 1. I need to change it to Pin 2 and I thought previously FPE had that functionality added but I am not seeing how I can change the polarity. Can you advise? |
Replies:
Posted By: Tom H
Date Posted: 23 Apr 2014 at 6:20am
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Did you try the "Mirror" feature? ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - X - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |
Posted By: ejkreiner
Date Posted: 23 Apr 2014 at 6:37am
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I did Tom. Polarity needs to be on pin 2, which is lower left as you are seeing the footprint preview. I have tried every combination of L/R/U/D and mirror and get the polarity set on the LL where I want it, but when I redorder the pins the polarity pad is flipping to the UR pin and the pin number reorder themselves from 1-4 CCW with pin 1 UL to to 1-4 CW with pin one now LL and polarity pad on pin 3. |
Posted By: Jeff.M
Date Posted: 23 Apr 2014 at 6:39am
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After building the part left-click on the pin you want to be the new pin one. Then right-click and select 'Reorder Pins'. Left-click on the pins in the order you want them to increment. Right-click and select 'Done Reordering' and save or build. ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - Twitter - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |
Posted By: ejkreiner
Date Posted: 23 Apr 2014 at 6:47am
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Jeff, when I calculate the part the pin order is set the way it needs to be. Pin one is upper left in the preview window and the pins increment 2-4 counterclockwise. Pin 1 has the larger polarity pad. I need the polarity pad to be on pin 2. It seems to be blind luck using mirror/orientation buttons to get the larger pad on the lower left pin. When I do that and try to reorder the pins back to where they need to be it goes haywire. |
Posted By: ejkreiner
Date Posted: 23 Apr 2014 at 6:53am
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I have captured screenshots of what it is doing. Is there a way to upload them here or can I email them to you? |
Posted By: Jeff.M
Date Posted: 23 Apr 2014 at 7:10am
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email to: jeff.mellquist*at*pcblibraries*dot*com ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - Twitter - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |
Posted By: ptkvgl
Date Posted: 16 Jan 2015 at 7:03am
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Hello! Did you get this problem solved? I've got the same one and can't understand how to use the "Reorder Pins" functionality... I would like to generate a " http://www.ricoh.com/LSI/product_power/pkg/sc-82ab.pdf" rel="nofollow - SC-82AB " footprint. Unfortunately I can't get pin 1 (small) and pin 2 (large) placed according to the datasheet... Please could you tell me, what am I doing wrong? Thanx in advance... |
Posted By: Tom H
Date Posted: 16 Jan 2015 at 8:57am
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This is fixed in V2015.06. This is a SOT143 Reverse.
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Posted By: ptkvgl
Date Posted: 19 Jan 2015 at 12:45am
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Hi Tom, In fact, pretty easy... Thank you very much and have a nice day... |