UFS (Universal Flash Storage)

UFS Versions 4.1 and 5.0

Both UFS 4.1 and UFS 5.0 are in development in JEDEC’s JC-64.1 Subcommittee for Electrical Specifications and Command Protocols. JEDEC encourages companies to join and help shape the future of JEDEC standards. Membership grants access to pre-publication proposals and provides early insights into active projects such as UFS 4.1 and UFS 5.0. Discover the benefits of membership and join today.

UFS Version 4.0

UFS is specifically tailored for mobile applications and computing systems requiring high performance and low power consumption. In August 2022, JEDEC published JESD220F UFS 4.0, which is an update to version 3.1 published in 2020.

Simplifying Design, Reducing System Cost & Improving Device Performance

JEDEC also offers several complementary standards:

• JESD220-3A UFS High Performance Booster (HPB) Extension
• JESD223E UFS Host Controller Interface (UFSHCI) version 4.0
• JESD220-1A UFS Unified Memory Extension version 1.1
• JESD223-1B UFS Host Controller Interface, supporting Unified Memory Extension version 1.1
• JESD224 UFS (Test)
• JESD220-4 UFS File Based Optimizations (FBO) Extension, version 1.01
• JESD220-5 Zoned Storage for UFS

UFS Card Standard

JESD220-2B Universal Flash Storage (UFS) Card Extension Standard was updated in November 2020. Version 3.0 of this removable memory card standard standardizes functionality that aligns with UFS version 3.0.

Collaboration with the MIPI Alliance®

To achieve the highest performance and most power efficient data transport, JEDEC UFS leverages industry leading specifications from the MIPI® Alliance to form its Interconnect Layer. This collaboration continues with UFS version 4.0, which references the MIPI M-PHY® v5.0 physical layer specification and the MIPI UniPro® v2.0 transport layer specification.  

For more information about MIPI specifications related to UFS, visit:

Partnership with UFSA

JEDEC partners with the Universal Flash Storage Association (UFSA), which was created to support the widespread adoption and acceptance of the JEDEC UFS standard. UFSA’s primary mission includes the promotion of UFS technology and infrastructure by providing product compliance and UFS logo certification management. Through compliance testing UFSA provides valuable input back to JEDEC for future specification development. www.ufsa.org.

About UFS

UFS is an open standard, high-performance interface designed for use in applications where power consumption needs to be minimized, including mobile systems such as smartphones and tablets as well as automotive applications. Its high-speed serial interface and optimized protocol enable significant improvements in throughput and system performance.