Inventors of Flash Memory Drive Next-Gen Automotive Innovation with Higher Performance, More Efficient Data Handling, and Automotive-Grade Reliability

KIOXIA America, Inc. today announced that it has begun sampling¹ new Universal Flash Storage² (UFS) Ver. 4.1 embedded memory devices designed for automotive applications. Engineered to meet the rigorous demands of next-generation in-vehicle systems, these new devices deliver significant performance, flexibility, and diagnostic enhancements - powered by KIOXIA’s 8^th generation BiCS FLASH^™ 3D flash memory technology and in-house designed controller technology.

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Available in capacities of 128 GB, 256 GB, 512 GB and 1 TB, Kioxia’s new Automotive UFS 4.1 devices are designed to fit the needs of infotainment, ADAS, telematics, domain controllers, and vehicle computers. They meet AEC-Q100/104 Grade 2 standards, supporting case temperature up to 115°C.

Available in capacities of 128 gigabytes (GB), 256 GB, 512 GB and 1 terabyte (TB), the new UFS 4.1 devices are designed to fit the needs of infotainment, ADAS³, telematics, domain controllers, and vehicle computers. They meet AEC-Q100/104⁴ Grade 2 standards, supporting case temperature up to 115°C.

Elevating the performance from KIOXIA’s previous UFS 3.1 generation⁵, the new UFS 4.1 (512 GB) devices deliver⁶:

• Approximately 2.1 times sequential read performance
• Approximately 2.5 times sequential write performance
• Approximately 2.1 times random read performance
• Approximately 3.7 times random write performance

These improvements provide a more responsive user experience in data-intensive automotive environments.

Key features include:

• Compliant with the UFS 4.1 Specification, which includes WriteBooster related extensions such as WriteBooster Buffer Resizing and Pinned Partial Flush Mode, providing better flexibility for optimal performance. UFS 4.1 is backward compatible with UFS 4.0 and UFS 3.1
• Enhanced Diagnostic Capabilities, including a newly added vendor-specific device health descriptor, simplifying device status monitoring and predictive maintenance
• 8^th Generation KIOXIA BiCS FLASH 3D flash memory

UFS Ver. 4.1 devices from KIOXIA integrate the company’s innovative BiCS FLASH 3D flash memory and a controller in a JEDEC^®-standard package. KIOXIA’s 8th generation BiCS FLASH 3D flash memory introduces CBA (CMOS directly Bonded to Array) technology - an architectural innovation that marks a step-change in flash memory design.

“KIOXIA continues to drive innovation in automotive memory with our new UFS 4.1 devices,” said Maitry Dholakia, vice president, Memory Business Unit, KIOXIA America, Inc. “As modern vehicles grow more complex and technologies like AI, multi-gigabit Ethernet and real-time data processing become essential, our UFS 4.1 solutions empower developers to design the next generation of intelligent, responsive vehicles.”

For more information, please visit www.kioxia.com and follow the company on X, formerly known as Twitter and LinkedIn^®.

About KIOXIA America, Inc.

KIOXIA America, Inc. is the U.S.-based subsidiary of KIOXIA Corporation, a leading worldwide supplier of flash memory and solid-state drives (SSDs). From the invention of flash memory to today’s breakthrough BiCS FLASH™ 3D technology, KIOXIA continues to pioneer innovative memory, SSD and software solutions that enrich people's lives and expand society's horizons. The company's innovative 3D flash memory technology, BiCS FLASH, is shaping the future of storage in high-density applications, including advanced smartphones, PCs, automotive systems, data centers and generative AI systems. For more information, please visit KIOXIA.com.

© 2025 KIOXIA America, Inc. All rights reserved. Information in this press release, including product pricing and specifications, content of services, and contact information is current and believed to be accurate on the date of the announcement, but is subject to change without prior notice. Technical and application information contained here is subject to the most recent applicable KIOXIA product specifications.

Notes:

1: Sample shipments of the 1TB device began in June, 128 GB and 256 GB device began in July. Specification of the samples may differ from commercial products

2: Universal Flash Storage (UFS) is a product category for a class of embedded memory products built to the JEDEC UFS standard specification. Due to its serial interface, UFS supports full duplexing, which enables both concurrent reading and writing between the host processor and UFS device

3: Advanced Driver Assistance System

4: Electrical component qualification requirements defined by the AEC (Automotive Electronics Council)

5: UFS3.1 512 GB device “THGJFGT2T85BAB5”

6: Based on Kioxia internal testing

In every mention of a KIOXIA product: Product density is identified based on the density of memory chips(s) within the product, not the amount of memory capacity available for data storage by the end user. In terms of product capacity, available user storage capacity (including examples of various media files) will vary based on file size, formatting, settings, software and operating system, pre-installed software applications, media content, and other constraints. Actual formatted capacity may vary. KIOXIA Corporation defines a gigabit (Gb) as 1,073,741,824 bits, a megabyte (MB) as 1,000,000 bytes, a gigabyte (GB) as 1,000,000,000 bytes and a terabyte (TB) as 1,000,000,000,000 bytes. However, a computer operating system, reports storage capacity using powers of 2 for the definition of 1 GB = 2^30 bytes = 1,073,741,824 bytes and 1 TB = 2^40 bytes = 1,099,511,627,776 bytes.

Read and write speeds are the best values obtained in a specific test environment at Kioxia Corporation and Kioxia Corporation warrants neither read nor write speeds in individual devices. Read and write speed may vary depending on a device used and file size read or written.

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“As modern vehicles grow more complex and technologies like AI, multi-gigabit Ethernet and real-time data processing become essential, our UFS 4.1 solutions empower developers to design the next generation of intelligent, responsive vehicles.”