CFP/CQFP
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=1755
Printed Date: 18 Nov 2024 at 6:47pm
Topic: CFP/CQFP
Posted By: AGONZ67
Subject: CFP/CQFP
Date Posted: 08 Sep 2015 at 12:08pm
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The image shown for CFP and CQFP is shown with gullwing leads. |
Replies:
Posted By: Tom H
Date Posted: 08 Sep 2015 at 2:06pm
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All CFP and CQFP must have their leads formed with a lead bender to the shape of a Gull Wing lead. ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - X - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |
Posted By: AGONZ67
Date Posted: 08 Sep 2015 at 2:10pm
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Yes, I understand that, but I am looking for information on how to calculate the dimensions, "L" & "E" to enter into PCBLE? Is there a formula for arriving at these dimensions? From the image below, where do I get the information for the bends, the height of the leads, the length of the leads etc to enter into the Library expert? |
Posted By: Tom H
Date Posted: 08 Sep 2015 at 2:13pm
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The dimensions must come from the assembly shop or manufacturer that is performing the lead bending. ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - X - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |
Posted By: AGONZ67
Date Posted: 09 Sep 2015 at 11:56am
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Once the dimensions are provided from the assembly shop or manufacturer it is created as either a CFP, or CQFP, which appears to be calculated the same as SOIC, or QFP ? What benefit is provided by having a separate CFP, CQFP entry other than the prefix of the name? |
Posted By: Tom H
Date Posted: 09 Sep 2015 at 1:24pm
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Because Library Expert outputs perfect 3D STEP models and there is a BIG difference in a black plastic molded QFP and a Ceramic CQFP. Also, the FPX file "Physical Description" is different and IPC-7351 standard has different categories for these component families. That's about it. ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - X - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |