Main Memory: DDR4 & DDR5 SDRAM

Semiconductor memory plays an essential role in the development and functions of countless electronic devices ranging from computers and servers to 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 the most recent update, JESD79-5C, in April 2024. This latest update includes the addition of features designed to improve reliability and security and to enhance performance in a wide range of applications from high-performance servers to emerging technologies such as AI and machine learning.  JESD79-5C DDR5 is available for download from the JEDEC website


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 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
JC-16,40,42,45,63,64 Vancouver 25 - 28 Aug 2025