Memory Configurations: JESD21-C

JESD21-C, JEDEC Configurations for Solid State Memories, is a compilation of some 3000 pages of all memory device standards for solid state memory including DIMM, DRAM, SDRAM, MCP, PROM, and others from September 1989 to present. The document is divided into sections for ease of use. Each section can be searched by following one of the links listed on the menu "JESD21-C Standards" on the right of this page. 

The JEDEC JC-42 Committee on RAM Memory and its Subcommittees, JC-45 Committee on Memory Modules and its Subcommittees and the JC-63 Committee on Multi Chip Packages develop the standards in JESD21-C and are responsible for updating the publication.

An annual updating service for JESD21 is available by subscription. Subscribers receive periodic electronic updates for replacement or insertion into the hard copy JESD21-C.

A complete hard copy of JESD21-C is available for purchase. The hard copy comes in two 3” wide 3-ring binders so that future updates can be added with ease.

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Recent Documents

Title Document # Date
Annex D, Raw Card D, in 288-Pin, 1.2 V (VDD), PC4-1600/PC4-1866/PC4-2133/PC4-2400/PC4-2666/PC4-3200 DDR4 SDRAM Registered DIMM Design Specification MODULE4_20_28_AnnexD Oct 2014
Annex B, Raw Card B, in 288-Pin, 1.2 V (VDD), PC4-1600/PC4-1866/PC4-2133/PC4-2400/PC4-2666/PC4-3200 DDR4 SDRAM Registered DIMM Design Specification MODULE4_20_28_AnnexB Oct 2014
Annex J, R/C J, in 288-Pin, 1.2 V (VDD), PC4-1600/PC4-1866/PC4-2133/PC4-2400/PC4-2666/PC4-3200 DDR4 SDRAM Registered DIMM Design Specification MODULE4_20_28_AnnexJ Oct 2014
Annex G, R/C G, in 288-Pin, 1.2 V (VDD), PC4-1600/PC4-1866/PC4-2133/PC4-2400/PC4-2666/PC4-3200 DDR4 SDRAM Registered DIMM Design Specification MODULE4_20_28_AnnexG Oct 2014
288-Pin, 1.2 V (VDD), PC4-1600/PC4-1866/PC4-2133/PC4-2400/PC4-2666/PC4-3200 DDR4 SDRAM Registered DIMM Design Specification MODULE4_20_28 Sep 2014
288-Pin, 1.2 V (VDD), PC4-1600/PC4-1866/PC4-2133/PC4-2400/PC4-2666/PC4-3200 DDR4 SDRAM Load Reduced DIMM Design Specification MODULE4_20_27 Sep 2014
Annex B, Raw Card B, in 288-Pin, 1.2 V (VDD), PC4-1600/PC4-1866/PC4-2133/PC4-2400/PC4-2666/PC4-3200 DDR4 SDRAM Load Reduced DIMM Design Specification. Item 2232.08B MODULE4_20_27_AnnexB Sep 2014
Annex E, R/C E, in 260-Pin, 1.2 V (VDD), PC4-1600/PC4-1866/PC4-2133/PC4-2400/PC4-2666/PC4-3200 DDR4 SDRAM SODIMM Design Specification MODULE4_20_25_AnnexE Aug 2014
Annex F, R/C F, in 260-Pin, 1.2 V (VDD), PC4-1600/PC4-1866/PC4-2133/PC4-2400/PC4-2666/PC4-3200 DDR4 SDRAM SODIMM Design Specification MODULE4_20_25_AnnexF Aug 2014
Annex B, R/C B, in 288-Pin, 1.2 V (VDD), PC4-1600/PC4-1866/PC4-2133/PC4-2400/PC4-2666/PC4-3200 DDR4 SDRAM Unbuffered DIMM Design Specification MODULE4_20_26_AnnexB Aug 2014

Related Committees and Subcommittees

JC-42Solid State Memories
JC-42.2SRAM Memories
JC-42.3DRAM Memories
JC-42.3BDRAM Functions and Features
JC-42.3CDRAM Timing
JC-42.3DDRAM Pinouts
JC-42.4Non-Volatile Memory Devices
JC-42.6Low Power Memories
JC-45DRAM Modules
JC-45.1Registered DRAM Modules
JC-45.2Unbuffered DRAM Modules
JC-45.3Unbuffered DRAM Modules
JC-45.4Fully Buffered DRAM Modules
JC-45.5Module Interconnect
JC-63Multiple Chip Packages

Events and Meetings

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