Gen3 UCIe IP elevates chiplet link speeds

Alphawave Semi’s Gen3 UCIe Die-to-Die (D2D) IP subsystem enables chiplet interconnect rates up to 64 Gbps. Building on the successful tapeout of its Gen2 36-Gbps UCIe IP on TSMC’s 3-nm process, the Gen3 subsystem supports both high-yield, low-cost organic substrates and advanced packaging technologies.

At 64 Gbps, the Gen3 IP delivers over 20 Tbps/mm in bandwidth density with ultra-low power and latency. The configurable subsystem supports multiple protocols, including AXI-4, AXI-S, CXS, CHI, and CHI-C2C, enabling high-performance connectivity across disaggregated systems in HPC, data center, and AI applications.

The design complies with the latest UCIe specification and features a scalable architecture with advanced testability, including live per-lane health monitoring. UCIe D2D interconnects support a variety of chiplet connectivity scenarios, including low-latency, coherent links between compute chiplets and I/O chiplets, as well as reliable optical I/O connections.

“Our successful tapeout of the Gen2 UCIe IP at 36 Gbps on 3-nm technology builds on our pioneering silicon-proven 3-nm UCIe IP with CoWoS packaging,” said Mohit Gupta, senior VP & GM, Custom Silicon & IP, Alphawave Semi. “This achievement sets the stage for our Gen3 UCIe IP at 64 Gbps, which is on target to deliver high performance, 20-Tbps/mm throughput functionality to our customers who need the maximization of shoreline density for critical AI bandwidth needs in 2025.”

Alphawave Semi 

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