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e.MMC | JEDEC

e.MMC

e.MMC v5.1B

In September 2025, JEDEC published the latest version of its popular e.MMC standard: JESD84-B51B: Embedded MultiMediaCard (e.MMC), Electrical Standard (5.1B). 

e.MMC v5.1B defines features and updates for this embedded mass-storage flash memory that is widely used in smartphones and other mobile devices.  JESD84-B51B is available for  download from the JEDEC website for JEDEC members, and for purchase by non-members. JESD84-B51B replaces all past versions of the e.MMC standard.

About e.MMC

Designed for a wide range of applications in consumer electronics, mobile phones, handheld computers, navigational systems and other industrial uses, e.MMC is an embedded non-volatile memory system, comprised of both flash memory and a flash memory controller, which simplifies the application interface design and frees the host processor from low-level flash memory management. This benefits product developers by simplifying the non-volatile memory interface design and qualification process – resulting in a reduction in time-to-market as well as facilitating support for future flash device offerings. Small BGA package sizes and low power consumption make e.MMC a viable, low-cost memory solution for mobile and other space-constrained products.