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Thunderbolt PCIe interface

Hi Team,

I have a customer working on a Thunderbolt interface application and I am looking for your advice/expertise.

From the customer:
“I am developing a hardware product which will use Thunderbolt as the interface between the product and the host (which will be a mac).
What I need at this point is a pcie interface that will handle the 4 lanes of pcie from the thunderbolt controller and provide digital audio I/O on the other side. This is the interface that sits between the thunderbolt controller and multiple ADC's and DAC's (maybe 8 each).
Do you have any recommendations and know of any off the shelf parts?”

Is there a TI solution for this? Do you have any suggestions?

Thanks,
Dylan