PCB Libraries Forum : Naming Convention https://www.PCBLibraries.com/forum/ Sat, 04 Apr 2026 02:13:11 +0000 Fri, 17 Mar 2023 08:57:39 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=3182 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[Naming Convention : The biggest difference between...]]> https://www.PCBLibraries.com/forum/naming-convention_topic3182_post12913.html#12913 Author: Tom H
Subject: 3182
Posted: 17 Mar 2023 at 8:57am

The biggest difference between PCB Libraries and IPC-7352 Footprint Naming Conventions is the Pin Quantity location. 

PCB Libraries follows the original IPC-7351C naming convention where the chair person of the IPC Land Pattern committee Karen McConnell relocated the Pin Qty. to the beginning of the footprint name. The full subcommittee of the 7351 voted and approved the new naming convention that Karen introduced. 

The component family, pin qty. and pin pitch are together, followed by the package dimensions.  

Example: SOP24P65_780X640X120L60X24

The IPC-7352 guide went back to the original IPC-7351B where the pin qty. was at the end of the Footprint Name. 

The component family, pin pitch are together, followed by the package dimensions and the pin qty last.

Example: SOP65P640X120-24

One of the problems with the 7352 for SOP packages, they didn't add the Package Length in the name and many people have been burned by this. Also, the Terminal Length is not included. 

]]> Fri, 17 Mar 2023 08:57:39 +0000 https://www.PCBLibraries.com/forum/naming-convention_topic3182_post12913.html#12913 <![CDATA[Naming Convention : Hello Tom,Regarding the naming...]]> https://www.PCBLibraries.com/forum/naming-convention_topic3182_post12911.html#12911 Author: zentekfr
Subject: 3182
Posted: 17 Mar 2023 at 6:38am

Hello Tom,

Regarding the naming convention, we currently use the "PCB Libraries" option. Would you recommend to switch to IPC-7352?
Changes between the two are still unclear to me.

Thanks!
]]> Fri, 17 Mar 2023 06:38:59 +0000 https://www.PCBLibraries.com/forum/naming-convention_topic3182_post12911.html#12911 <![CDATA[Naming Convention : I don&#039;t have a clue. It&#039;s...]]> https://www.PCBLibraries.com/forum/naming-convention_topic3182_post12906.html#12906 Author: Tom H
Subject: 3182
Posted: 10 Mar 2023 at 10:07am

I don't have a clue. It's been silent at IPC. It's not even mentioned that there's a Land Pattern Committee meeting at IPC SummerCon in Milwaukee in May. 

I just post several questions on IPC Works asking for the status and whether or not the holdup is due to adding Imperial Units to the publication. 

]]> Fri, 10 Mar 2023 10:07:51 +0000 https://www.PCBLibraries.com/forum/naming-convention_topic3182_post12906.html#12906 <![CDATA[Naming Convention : Hey Tom,Is there any update on...]]> https://www.PCBLibraries.com/forum/naming-convention_topic3182_post12904.html#12904 Author: bolaandrews
Subject: 3182
Posted: 10 Mar 2023 at 8:40am

Hey Tom,

Is there any update on IPC-7352
]]> Fri, 10 Mar 2023 08:40:27 +0000 https://www.PCBLibraries.com/forum/naming-convention_topic3182_post12904.html#12904 <![CDATA[Naming Convention : IPC-7352 adds through-hole guidelines,...]]> https://www.PCBLibraries.com/forum/naming-convention_topic3182_post12877.html#12877 Author: Tom H
Subject: 3182
Posted: 16 Feb 2023 at 2:15pm

IPC-7352 adds through-hole guidelines, updates surface mount guidelines and completely replaces IPC-7351. 

IPC-7352 was approved by committee ballot vote after 2nd go around and submitted to typesetting on September 27, 2022. 

It normally takes 3 - 4 months of typesetting and proofing. 

On January 18, 2023 a land pattern committee member asked to add Imperial Units to all dimensions. This might be the hold up, but I don't know why IPC would backtrack on it's commitment to only produce standards in metric units. 

]]> Thu, 16 Feb 2023 14:15:34 +0000 https://www.PCBLibraries.com/forum/naming-convention_topic3182_post12877.html#12877 <![CDATA[Naming Convention : Tom H wrote:The IPC-7351B is...]]> https://www.PCBLibraries.com/forum/naming-convention_topic3182_post12876.html#12876 Author: kfisher
Subject: 3182
Posted: 16 Feb 2023 at 2:04pm

Originally posted by Tom H Tom H wrote:

The IPC-7351B is 12 years old. 

It will be replaced with IPC-7352 in January.
I guess I didn't realize this until now, but IPC-7352 has just been section 8 within IPC-7351B this whole time (and IPC-7353 thru -7359 are sections 9-15) ... is the IPC-7352 section getting updated, or is it actually replacing (consuming?) the entirety of IPC-7351?

Do you know if the new IPC-7352 been published yet?   I don't see it listed in the standards repository my employer subscribes to.  (maybe it just takes them a bit to update?)
]]> Thu, 16 Feb 2023 14:04:35 +0000 https://www.PCBLibraries.com/forum/naming-convention_topic3182_post12876.html#12876 <![CDATA[Naming Convention : Not 100%.IPC-7352 only adds the...]]> https://www.PCBLibraries.com/forum/naming-convention_topic3182_post12759.html#12759 Author: Tom H
Subject: 3182
Posted: 03 Jan 2023 at 11:52am

Not 100%. 

IPC-7352 only adds the terminal lead length for Gull Wing leads. 

PCB Libraries (IPC-7351C) added the terminal length for all terminal lead sizes like Flat Lead for QFN, SON, CAPAE, Corner Concave Oscillators, J-Lead SOJ, etc. 

]]> Tue, 03 Jan 2023 11:52:44 +0000 https://www.PCBLibraries.com/forum/naming-convention_topic3182_post12759.html#12759 <![CDATA[Naming Convention : One of the benefits that drew...]]> https://www.PCBLibraries.com/forum/naming-convention_topic3182_post12758.html#12758 Author: kfisher
Subject: 3182
Posted: 03 Jan 2023 at 11:17am

One of the benefits that drew us to the "PCB Libraries" naming convention over 7351B was avoidance of name overlap.  In your opinion, do the modifiers incorporated as 7352 bring the IPC standard up to the same level of the "PCB Libraries" naming convention, or is there still an advantage to staying where we are?

And, where are some of the biggest differences that remain between the "PCB Libraries" and 7352 naming conventions?
]]> Tue, 03 Jan 2023 11:17:27 +0000 https://www.PCBLibraries.com/forum/naming-convention_topic3182_post12758.html#12758 <![CDATA[Naming Convention : PCB Libraries naming convention...]]> https://www.PCBLibraries.com/forum/naming-convention_topic3182_post12755.html#12755 Author: Tom H
Subject: 3182
Posted: 03 Jan 2023 at 9:58am

PCB Libraries naming convention was originally approved bythe IPC 1-13 Land Pattern Committee for inclusion in the IPC-7351C 5 years ago. 

We originally called the PCB Libraries naming convention IPC-7351C, but IPCcontacted us and asked us to remove all instances of IPC-7351C from our websiteand the Footprint Expert software 3 years ago. 

So we renamed IPC-7351C to PCB Libraries andcopyrighted it. This prevented IPC from using it in IPC-7352. However, IPC took some of the modifiers like "Thermal Pad Size", "Gull Wing Terminal Lead Size", and "BGA Ball Diameter" and added it to the end of the IPC-7351B naming convention. 

IPC-7352 also includes through-hole technology and a namingconvention for PTH footprints that Dieter Bergman and I developed 10 years agoand hasn’t been changed since.


]]> Tue, 03 Jan 2023 09:58:09 +0000 https://www.PCBLibraries.com/forum/naming-convention_topic3182_post12755.html#12755 <![CDATA[Naming Convention : How does the IPC-7352 naming convention...]]> https://www.PCBLibraries.com/forum/naming-convention_topic3182_post12751.html#12751 Author: kfisher
Subject: 3182
Posted: 03 Jan 2023 at 8:15am

How does the IPC-7352 naming convention compare with the 7351C "PCB Libraries" naming convention?]]> Tue, 03 Jan 2023 08:15:48 +0000 https://www.PCBLibraries.com/forum/naming-convention_topic3182_post12751.html#12751