PHY · Physical Layer
The physical-layer interface of a link, whether an Ethernet port or a die-to-die crossing; its ecosystem maturity, power, and silicon area often decide build-now versus wait-for-new-silicon.
Also written as: PHYs
Current numbers
>20 Tbps/mmUCIe 3.0: 64 GT/s. 64 Gbps PHY IP rated above 20 Tbps/mm. UCIe-3D: ~300 TB/s/mm² max at 1 µm pitch