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PCIe x4 to M.2 M-Key 2280 adapter

High-performance PCIe x4 (64P) to M.2 M-Key 2280 NVMe adapter.

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High-performance PCIe x4 (64P) to M.2 M-Key 2280 NVMe adapter.

4-layer PCB, impedance control (85 Ohm) and length matching.

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Mirko wrote 7 days ago point

Please lool for document: 

PCI Express Card Electromechanical Specification Revision 2/3/4.

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Mirko wrote 7 days ago point

No it not necessary to lenth match between thw diff pairs, I have bad habbits from other high speed interfaces :-) don't do this way as me :)

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benjaminaigner wrote 7 days ago point

Hi Mirko,

I really like your PCIe designs and I think they can guide me with some of my attempts.

A short question regarding the length tuning of the PCIe lanes:

Is it necessary to length-match all 4 lanes?

According to a PCIe spec I found (it's hard to find good information with being a PCI-SIG member) the inter-lane length matching is not critical.

But I understand: better safe than sorry :-)

Greetings

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