Main Memory: DDR4 & DDR5 SDRAM

Semiconductor memory plays an essential role in the development of countless electronic devices ranging from computers and gaming consoles to televisions and telecommunications products. JEDEC standards encompass virtually every key standard for semiconductor memory in the market today.


JEDEC published its widely-anticipated JESD79-5 DDR5 SDRAM standard in July 2020, and a second update, JESD79-5B, in August 2022. The standard addresses demand requirements being driven by intensive cloud and enterprise data center applications, providing developers with twice the performance and much improved power efficiency. JESD79-5B DDR5 is  available for download from the JEDEC website.  Read more about the DDR5 standard here.


First published in September 2012 and most recently updated in January 2020, the JEDEC DDR4 standard has been defined to provide higher performance, with improved reliability and reduced power, thereby representing a significant achievement relative to previous DRAM memory technologies. DDR4 (JESD79-4C) is available for download from the JEDEC website.

JC-42 Committee

Looking towards the future, JEDEC's JC-42 Committee for Solid State Memories stands at the forefront of the ongoing effort to produce next generation memory device standards. As with all JEDEC standards development activities, industry participation is welcome. Learn more about membership and join today.

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Events and Meetings

JC-16,40,42,45,63,64 Denver 3 - 6 Jun 2024
JC-16,40,42,45,63,64 Montreal 26 - 29 Aug 2024
JC-16,40,42,45,63,64 Waikoloa 2 - 5 Dec 2024
JC-16,40,42,45,63,64 San Diego/LaJolla 3 - 6 Mar 2025
JC-16,40,42,45,63,64 Hsinchu 2 - 5 Jun 2025