HATs and other add-ons • Re: What kind of cable connects to the M.2 HAT+ ?

I need a longer ribbon cable to connect the below M2 HAT+ to the pi and the connector on it is smaller than the normal ones, the description says it's a "subset of the of the M2 standard" but I have no idea what that is and can't find the cable anywhere.

Read this:
https://datasheets.raspberrypi.com/pcie ... andard.pdf

and this:
https://community.intel.com/cipcp26785/ ... on_v20.pdf

and note:
"The FFC used must be 50mm or shorter, and must offer controlled impedance. See Chapter 3."

As there are 5 GHz signals running through this cable the length is limited. So no, no longer cable. Period.

Ok, yes, there are ways around this. Use a CM5, design a custom carrier board and add PCIe redrivers in order to archive a longer cable length.
See https://www.ti.com/product/DS80PCI102
You need at least 5 years of high speed electronics experience for this.

Statistics: Posted by fchk — Sun Apr 20, 2025 8:39 pm

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