Author Topic: M.2 M-Key PCB template  (Read 2462 times)

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Offline jc101Topic starter

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M.2 M-Key PCB template
« on: September 14, 2023, 11:28:01 am »
I don't suppose anyone has an M.2 M-Key (same as NVME SSD) PCB template for Altium they could share?
Looking to make up a breakout board that plugs into one of these https://www.digikey.co.uk/en/products/detail/te-connectivity-amp-connectors/2199230-3/4208912
Microchip has used it on a dev board for a GFX connector, but I just want access to the GPIO ports.



 

Offline DavidAlfa

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Re: M.2 M-Key PCB template
« Reply #1 on: September 14, 2023, 11:44:56 am »
Might this help?
https://github.com/ryankurte/altium-library/blob/master/footprints/m2.PcbLib

First result googling "M2 Altium..."
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Offline jc101Topic starter

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Re: M.2 M-Key PCB template
« Reply #2 on: September 14, 2023, 11:49:38 am »
Sadly, different type of connector.
My Googlefoo has let me down thus far.
 

Offline ajawamnet

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Re: M.2 M-Key PCB template
« Reply #3 on: September 15, 2023, 10:41:54 pm »
This what you're looking for?  From an Eagle import

Offline ajawamnet

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Re: M.2 M-Key PCB template
« Reply #4 on: September 15, 2023, 11:09:38 pm »

Offline ajawamnet

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Re: M.2 M-Key PCB template
« Reply #5 on: September 15, 2023, 11:27:55 pm »
I just did some checking and I think his keys are off on the B M key - prob on the others too.

Offline ajawamnet

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Re: M.2 M-Key PCB template
« Reply #6 on: September 15, 2023, 11:36:20 pm »
Yea - I think his keys are off a bit.  He states on the github: https://github.com/timonsku/M.2-Card-Footprints
"he only footprint that has been verified with a PCB is the B-Key footprint. "

I ain't so sure about that.   On the top side, the Q dimension for the center of the arc in the slot is supposed to be 5.625 mm   -  his measures 5.60006 mm (typ. Altium rounding errors)

If it were me I'd use his thing as a guide and do my own keying as per that document...

talk about going down a rabbit hole.   This is why I hate all the maker stuff -  https://www.ajawamnet.com/ajawamnet/mama_i_wanna_be_a_maker.html . Well I guess it ain't no different than the original PCI template that Protel used to include - that too was off as per the PCI spec.   

Offline thm_w

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Re: M.2 M-Key PCB template
« Reply #7 on: September 18, 2023, 08:22:56 pm »
I don't think being off by 0.025mm will cause too many issues.
You can also use the STP file provided in OP and do a clearance check in solidworks or similar: https://www.te.com/usa-en/product-2199230-3.html should show if anything is obviously wrong.
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Offline ajawamnet

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Re: M.2 M-Key PCB template
« Reply #8 on: September 22, 2023, 04:32:11 pm »
I'd prefer that the dimensions be accurate in the design... things like tolerances in manufacturing, etc...  here's an edit that shows where the B arc should be in comparison to where he has the slot walls.


Also TE and other companies always have the disclaimer concerning their downloadable models - and I've had many a go-around with Snap and esp.  Ultralibrarian about them not being correct.  I even had one email back from Snap that stated they don't always go by the Mfg rec's... They eventually retracted that statement.   

So, yea - I think in this day and age stuff should be as nutz-dead-on as it can be in the design files (well, as on as Altium will allow with their rounding errors).  There's enough silly that happens in fab. 



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