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AFE8000: Unused SerDes Lanes Termination (STX, SRX)

Part Number: AFE8000

Tool/software:

Hello,

The STX & SRX pins of P/N AFE8000 are routed to a connector, and will be used on a single board for two projects:
In one project it will be connected to FPGA, and on the other one is will be floating.
we consider to connect these pins to GND to avoid noise (on the 2nd project).

In case we power down the STX & SRX pins, is it recommended to connect them directly to GND, or should we keep them floating?

Best regards,

Avihay,