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mnperry View Drop Down
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Points: 12 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mnperry Quote  Post ReplyReply Direct Link To This Post Topic: Naming Convention
    Posted: 20 Oct 2022 at 6:18am
The standard IPC naming standard does not have a separate category as in your naming standard for example: Ferrite Bead, Chip (that I can see anyway)

The IPC naming standard states to use FB_Mfr.'s Part Number

This is the name Footprint Expert gave to BLM15BD750SN1D: BEADC1005X55.
(I just did a quick test.)

In the Footprint Expert settings, for the naming standard to use, I chose: IPC-7351B and NOT PCB Libraries.

Am I missing seeing the use of "BEADC..." in the standard IPC naming standard?

Sorry if this is picky, but we are developing our internal standards and are hoping (and praying) to be as consistent as possible.

Thanks!
Mike
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Tom H View Drop Down
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Points: 5716 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 2022 at 9:30am
The IPC-7351B is 12 years old. 

It will be replaced with IPC-7352 in January. 

IPC-7352 has Ferrite Bead.......BEADC 
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mnperry View Drop Down
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Points: 12 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mnperry Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 2022 at 10:29am
Perfect! Thanks Tom.
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Points: 47 		Post Options Post Options   Thanks (0) Thanks(0)   Quote _sergey_ Quote  Post ReplyReply Direct Link To This Post Posted: 31 Oct 2022 at 4:21am
There is a problem with the naming of components.
Created 2 variants of one axial lead component:
1 Component close to the board (A=E)
2 Component with 1mm clearance to board (A=E+1)
The problem is that the program creates one footprint name for both variants. For correct binding to 3D models, unique footprint names are required.
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Tom H View Drop Down
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Points: 5716 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post Posted: 31 Oct 2022 at 8:23am
The Through-hole Land Pattern Naming Convention is right out of the upcoming new release of IPC-7352. 

You should manually add a Variant to the end of the Footprint Name for the "E" dimension if the Axial Lead package is sitting off the PCB. 

You should have joined the IPC Land Pattern committee. 
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Points: 16 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kfisher Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jan 2023 at 8:15am
How does the IPC-7352 naming convention compare with the 7351C "PCB Libraries" naming convention?
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Points: 5716 		Post Options Post Options   Thanks (1) Thanks(1)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jan 2023 at 9:58am

PCB Libraries naming convention was originally approved by the 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 IPC contacted us and asked us to remove all instances of IPC-7351C from our website and the Footprint Expert software 3 years ago. 

So we renamed IPC-7351C to PCB Libraries and copyrighted 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 naming convention for PTH footprints that Dieter Bergman and I developed 10 years ago and hasn’t been changed since.
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Points: 16 		Post Options Post Options   Thanks (1) Thanks(1)   Quote kfisher Quote  Post ReplyReply Direct Link To This Post 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?
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Points: 5716 		Post Options Post Options   Thanks (2) Thanks(2)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post 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. 
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Points: 16 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kfisher Quote  Post ReplyReply Direct Link To This Post 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?)
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