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Podcast EP351: A Detailed Overview of the Emerging Standards for 400G with Kent Lusted, Sonic AI
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Podcast EP351: A Detailed Overview of the Emerging Standards for 400G with Kent Lusted
Semiconductor Insiders
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Jun 19, 2026
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24:32
Interview
Podcast EP351: A Detailed Overview of the Emerging Standards for 400G with Kent Lusted
From
Semiconductor Insiders
Kent Lusted
(Distinguished Architect, Synopsys, guest)
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Executive Summary
The push for 400 gigabit per second (400G) per lane Ethernet is primarily driven by the architectural needs of next-generation AI and HPC systems, where accelerator-to-accelerator communication is the key performance bottleneck.
The IEEE 802.3 standards effort for 400G per lane is in its early 'study group' phase, focused on defining the project's scope and objectives, with a potential transition to a formal 'task force' in late 2026.
Successfully deploying 400G per lane technology will require a fundamental shift towards tighter co-design of silicon, packaging, boards, connectors, and optics to manage shrinking system margins and signal integrity challenges.
This transition represents a major architectural inflection point where electrical and optical interconnects must converge to meet the reach, density, and performance demands of future AI fabrics.
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