The importance of NAND Flash memory is growing—in everything from mobile phones to industrial systems. But until 2006 there was no standard, and thus no simple way to introduce new NAND Flash components into existing designs.

The lack of a standard caused serious design problems: host systems had to accommodate differences between vendors’ devices and adapt to generational changes in parts from a single vendor. All of this made incorporating new or updated NAND Flash components extremely costly, often requiring extensive hardware, firmware, and/or software changes, and additional testing, which slowed time to market.

ONFI works to solve all these issues by standardizing the NAND Flash interface—reducing vendor and generational incompatibilities and accelerating the adoption of new NAND products.

Blue-green irridescent NAND Flash memory wafer

Benefits and Features


Faster, easier design-in
Higher speeds
No requalification
Flexible packaging


  • EZ-NAND interface removed the burden of the host controller having to keep pace with the fast changing ECC requirements of NAND technology, improving throughput and minimizing write errors on NAND
  • Parameter page solves inconsistencies among devices by describing revision info, features, organization timing, and other vendor-specific data
  • Asynchronous and source-synchronous support
  • Backward compatibility simplifies qualification for new NAND devices
  • Low-power DDR I/O
  • Scalability for high-density applications
  • Broad support from more than 80 top-level companies, including Micron, Intel, SK Hynix, Western Digital, Phison and Sony


General Questions

What is the mission of the ONFI Workgroup?
Is this another card standard?
Does ONFI have any plans to include more member companies in the organization?
How will the ONFI standard help speed time-to-market for NAND-based products?
How will developers, OEMs and ODMs benefit from the work done by the ONFI Workgroup?
What types of products will ONFI 2.1 be used in?
Why was ONFI formed to do this work instead of the work being done in another industry standards organization?
Who's involved in your partnership with JEDEC to expand the reach of the ONFI specifications?
Technical Questions
What’s the difference between the ONFI 1.0 and 2.0 specs?
What’s the difference between the ONFI 2.0 and 2.1 specs?
Roadmap Questions
When were the ONFI specifications released?
When will the next revision of the specs be complete & what improvements will be made in the next gen development efforts?