Alphawave Semi, a developer of high-speed connectivity and compute silicon, has made available the industry’s first 3nm silicon-proven Universal Chiplet Interconnect Express (UCIe) Die-to-Die (D2D) IP subsystem.

Built on TSMC’s Chip-on-Wafer-on-Substrate (CoWoS) advanced packaging technology this complete PHY and controller subsystem, developed in close collaboration with TSMC, is tailored for high-demand applications such as hyperscale data centres, high-performance computing (HPC), and AI.

By utilising TSMC’s CoWoS 2.5D silicon-interposer-based packaging, the fully integrated and highly configurable subsystem delivers a high bandwidth density of 8 Tbps/mm while optimising I/O complexity, power efficiency, and latency.

The subsystem supports multiple industry protocols - including PCIe, CXL, AXI-4, AXI-S, CXS, and CHI, ensuring interoperability across the expanding chiplet ecosystem. Additionally, it features live per-lane health monitoring to boost system robustness and operates at speeds of 24 Gbps to meet the bandwidth needs of advanced D2D connectivity.

This UCIe IP subsystem is now available following extensive characterization of the silicon received from TSMC. Alphawave Semi’s team has worked to validate it against UCIe standards and specifications, across various process conditions (typical, slow, and fast), and under the targeted voltage and temperature conditions.

The successful validation of D2D link margin, TXIO, and RXIO loopback margins means that Alphawave Semi’s UCIe IP subsystem is ready for integration into customer SoC designs, supporting next-generation HPC and AI applications.

“Achieving successful silicon validation of 3nm 24 Gbps UCIe subsystem with TSMC’s advanced packaging is a significant milestone for Alphawave Semi and underscores the company’s expertise in utilising the TSMC 3DFabric ecosystem to deliver connectivity solutions,” said Mohit Gupta, Alphawave Semi’s SVP and GM, Custom Silicon and IP.

“Our recent collaboration with Alphawave Semi exemplifies how we collaborate with our Open Innovation Platform (OIP) ecosystem partners to enable significant advancements in packaging, meeting the increasing demands in AI and HPC applications,” added Dan Kochpatcharin, Head of Ecosystem and Alliance Management Division at TSMC. “We will continue our partnership with Alphawave Semi to advance the 3D IC design ecosystem to empower faster and power-efficient semiconductor designs.”

Alphawave Semi’s UCIe IP subsystem complies with the latest UCIe Specification Rev 2.0 and includes comprehensive testability and debug features such as JTAG, BIST, DFT, and Known Good Die (KGD) capabilities.

By: DocMemory
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