KIOXIA's UFS 5.0 embedded flash memory opens the door to powerful, compact, on-device AI

Q: What sequential read and write speeds does KIOXIA's UFS 5.0 deliver and how do those figures compare to UFS 4.1?

KIOXIA's UFS 5.0 delivers sequential read speeds of up to 10 GB/s and sequential write speeds of up to 9 GB/s. The article states this represents a massive leap forward compared to UFS 4.1 but does not provide specific UFS 4.1 speed figures.

Q: Which physical layer and protocol does KIOXIA UFS 5.0 use to achieve its lane throughput?

KIOXIA UFS 5.0 uses the MIPI M-PHY v6.0 physical layer and the UniPro v3.0 protocol to achieve its 46.6 Gb/s per-lane throughput.

Q: What package size and capacities will KIOXIA's UFS 5.0 be offered in for mobile devices?

KIOXIA's UFS 5.0 will be offered in a compact 7.5 x 13 mm BGA package and be available in 1 TB and 512 GB capacities.

Q: When will KIOXIA begin mass production of UFS 5.0 and are commercial samples available now?

KIOXIA says UFS 5.0 will enter mass production at the end of 2026. The company also confirms 1TB and 512GB UFS 5.0 devices are available now as commercial samples.

KIOXIA UFS 5.0 embedded flash memory delivers sequential read speeds of up to 10 GB/s and sequential write speeds of up to 9 GB/s.

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Kosta Andreadis

Senior Editor

Published Jul 29, 2026 3:26 AM CDT

1 minute & 30 seconds read time

TL;DR: KIOXIA's UFS 5.0 embedded flash, sampling now and mass-produced end of 2026, pairs an in-house controller with 8th‑gen BiCS FLASH to deliver up to 10 GB/s sequential read and 9 GB/s sequential write in a 7.5×13 mm, more power‑efficient BGA, targeting smartphones, tablets, gaming, AR/VR, and edge AI.

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KIOXIA's next-generation UFS 5.0 embedded flash memory is finally here, with the technology set to unlock a new level of performance for premium smartphones and other mobile devices when it enters mass production at the end of 2026. UFS 5.0 represents a massive leap forward compared to UFS 4.1, so much so that on-device AI will become faster and more responsive wherever it's deployed.

KIOXIA's UFS 5.0 embedded flash memory opens the door to powerful, compact, on-device AI 2

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KIOXIA UFS 5.0 technology combines a custom in-house controller with its impressive 8th-generation BiCS FLASH 3D memory technology to offer significant improvements in performance and efficiency. KIOXIA UFS 5.0 is also built on the latest JEDEC UFS 5.0 standard while leveraging the MIPI M-PHY v6.0 physical layer and UniPro v3.0 protocol to support an impressive 46.6 Gb/s per lane (theoretically) and around 10.8 GB/s of effective dual-lane read and write performance.

And when it comes to performance, the compact UFS 5.0 flash memory can deliver sequential read speeds of up to 10 GB/s, with sequential write speeds of up to 9 GB/s. And it does so in a tiny 7.5 x 13mm BGA package that's also more power efficient than the previous generation. For on-device AI, read speeds have been one of the biggest limiting factors for premium smartphones and tablets, which makes UFS 5.0 an important step forward for embedded flash memory.

Read more: KIOXIA's UFS 5.0 flash storage will bring next-gen speeds to next-gen smartphones

In addition to smartphones and tablets, UFS 5.0 will also make its way into portable gaming systems, AR/VR devices, robots, security cameras, and edge applications where data-intensive workloads require fast local storage.

"On-device AI is fundamentally changing storage requirements," said Maitry Dholakia, vice president, Memory Business Unit, KIOXIA America, Inc. "As AI models become larger and more sophisticated, storage performance has become a critical enabler of overall system responsiveness. KIOXIA UFS 5.0 is designed to deliver the speed, efficiency, and capacity needed to help customers unlock the next generation of AI-enabled mobile and edge devices."

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Question #1

What sequential read and write speeds does KIOXIA's UFS 5.0 deliver and how do those figures compare to UFS 4.1?

Question #2

Which physical layer and protocol does KIOXIA UFS 5.0 use to achieve its lane throughput?

Question #3

What package size and capacities will KIOXIA's UFS 5.0 be offered in for mobile devices?

Question #4

When will KIOXIA begin mass production of UFS 5.0 and are commercial samples available now?

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KIOXIA UFS 5.0 will be available in 1TB and 512GB capacities, with the company confirming that these compact storage solutions are now available as commercial samples ahead of mass production. KIOXIA UFS 5.0 will also be on hand at the FMS: the Future of Memory and Storage event, taking place August 4 through to 6 in Santa Clara, California.