UCIe 3.0 Spec Released with Big Speed Up for Chiplets

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Aug. 05, 2025 – 

The UCIe 3.0 spec is out with a big speed up for future generations of chiplets. For those who need to catch up, UCIe is the leading consortium for chiplet interoperability. When we talk about future generations of packages, the idea that IP from different companies can be fabricated at different foundries and then assembled into working packages is a driving force behind this design.

UCIe 3.0 Spec Released with Big Speed Up for Chiplets

It feels like yesterday we were covering the Universal Chiplet Interconnect Express UCIe 1.0 Launch. That was actually back in 2022. Since then, we have been getting annual updates in the August timeframe. This year, we are on UCIe 3.0.

UCIe 3.0’s headline feature is higher bandwidth density for UCIe-S and UCIe for 2D and 2.5D designs. Doubling the data rate yields more throughput per pin and that matters when chip-to-chip communication is often gated by the number of connections that can fit into an area of a chip.

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