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Preliminary publication of BoD-approved ballot material, prior to its inclusion in the next release of the appropriate JEDEC Standard. Item 2099.01b

Committee(s): JC-45

JESD21-C Solid State Memory Documents Main Page

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This document defines the DDR3 SDRAM standard, including features, functionalities, AC and DC characteristics, packages, and ball/signal assignments. The purpose of this Standard is to define the minimum set of requirements for JEDEC compliant 512 Mb through 8 Gb for x4, x8, and x16 DDR3 SDRAM devices. This document was created based on the DDR2 standard (JESD79-2) and some aspects of the DDR standard (JESD79). Each aspect of the changes for DDR3 SDRAM operation were considered and approved by committee ballots). The accumulation of these ballots were then incorporated to prepare this standard (JESD79-3), replacing whole sections and incorporating the changes into Functional Description and Operation. Item 1627.14

Patents(): A complete list of Assurance/Disclosure Forms is available to JEDEC members in the Members Area. Non-members can obtain individual Assurance/Disclosure Forms on request from the JEDEC office.

Committee(s): JC-42.3

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Preliminary publication of BoD-approved ballot material, prior to its inclusion in the next release of JESD21C. Item 2207.11

Committee(s): JC-45.1

JESD21-C Solid State Memory Documents Main Page

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This standard defines the form, fit and function of SODIMM DDR4 connectors for modules supporting channels with transfer rates as high as 3.2 GT/S. It contains mechanical, electrical and reliability requirements for a one-piece connector mated to a module with nominal thickness of 1.20 mm. The intent of this document is to provide Performance Standards to enable connector, system designers and manufacturers to build, qualify and use the SODIMM DDR4 connectors in client and server platforms. Item 11.14-179E

Patents(): FOXCONN US PATENT NO.: 5,882,211; 6,126,472; 6,113,398

Committee(s): JC-11.14

JEP95 Registrations Main Page

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This section covers DDR4 and DDR4E in both DRAM-only module types and Hybrid module types, as well as pre-production modules of both types. Item 2224.13A

Committee(s): JC-45

JESD21-C Solid State Memory Documents Main Page

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This version is a minor editorial adding Annex B that was left out of the original publication October 2020.

An NVDIMM-P device is defined as a LRDIMM memory module which provides host controller access to DRAM and/or other memory devices such as persistent memory.  A transactional protocol is described for NVDIMM-P, which may be used on a DDR interface allowing operation of both standard DRAM modules and NVDIMM-P modules on the same channel. Item 2233.98K.

Committee(s): JC-45.6

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Terminology update.

This document defines standard specifications of DC interface parameters, switching parameters, and test loading for definition of the DDR4 Registering Clock Driver (RCD) with parity for driving address and control nets on DDR4 RDIMM and LRDIMM applications.

Patents(): A complete list of Assurance/Disclosure Forms is available to JEDEC members in the Members Area. Non-members can obtain individual Assurance/Disclosure Forms on request from the JEDEC office.

Committee(s): JC-40.4

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Item 2231.09

Committee(s): JC-45.3

JESD21-C Solid State Memory Documents Main Page

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This standard defines standard specifications for features and functionality, DC & AC interface parameters and test loading for definition of the DDR5 data buffer for driving DQ and DQS nets on DDR5 LRDIMM applications. The purpose is to provide a standard for the DDR5DB01 (see Note) logic device, for uniformity, multiplicity of sources, elimination of confusion, ease of device specification, and ease of use. Item 323.98K

Committee(s): JC-40.4

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This document defines standard specifications of DC interface parameters, switching parameters, and test loading for definition of the DDR5 Clock Driver (CKD) for re-driving the DCK for CUDIMM, CSODIMM and CAMM applications. The DDR5CKD01 Device ID is DID = 0x0531. (5 = DDR5,
3= Clock Driver, 1= rev 01)

Committee(s): JC-40, JC-40.4

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This standard, JESD324-V0-RCA, “DDR5 Clocked Small Outline Dual Inline Memory Module (CSODIMM) Raw Card A Annex” defines the design detail of x8, 1 Package Ranks DDR5 CSODIMM with Clock Driver.

Committee(s): JC-45, JC-45.3

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This standard, JESD324-V0-RCC, "DDR5 Clocked Small Outline Dual Inline Memory Module (CSODIMM) RawCard C Annex" defines the design detail of x16, 1 Package Ranks DDR5 CSODIMM with Clock Driver.

Committee(s): JC-45.3

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This standard, JESD323-A0-RCA, “DDR5 Clocked Unbuffered Dual Inline Memory Module (CUDIMM) Raw Card A Annex” defines the design detail of x8, 1 Package Rank DDR5 NECC CUDIMM with Clock Driver.

Committee(s): JC-45, JC-45.3

This standard, “JESD323-A0-RCC, “DDR5 Clocked Unbuffered Dual Inline Memory Module (CUDIMM) Raw Card C Annex” defines the design detail of x16, 1 Package Ranks DDR5 Clocked UDIMM.

Committee(s): JC-45, JC-45.3

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This annex, JESD323-A0-RCB, “DDR5 Clocked Unbuffered Dual Inline Memory Module (CUDIMM) Raw Card B Annex", defines the design detail of x8, 2 Package Ranks DDR5 CUDIMM. The common feature of DDR5 CUDIMM such as the connector pinout can be found in the JESD323, DDR5 Clocked Unbuffered Dual Inline Memory Module (CUDIMM) Common Standard.

Committee(s): JC-45, JC-45.3

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This annex, JESD323-B4-RCE, “DDR5 Clocked Unbuffered Dual Inline Memory Module (CUDIMM) Raw Card E Annex" defines the design detail of x8, 2 Package Ranks DDR5 CUDIMM. The common feature of DDR5 CUDIMM such as the connector pinout can be found in the JESD323, DDR5 Clocked Unbuffered Dual Inline Memory Module (CUDIMM) Common Standard.

Committee(s): JC-45, JC-45.3

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This standard, JESD305-R4-RCB, DDR5 Registered Dual Inline Memory Module with 4-bit ECC (EC4 RDIMM) Raw Card B Annex, defines the design detail of x4, 2 Package Ranks DDR5 RDIMM with 4-bit ECC. The common feature of DDR5 RDIMM, such as the connector pinout, can be found in the JESD305, DDR5 Load Reduced (LRDIMM) and Registered Dual Inline Memory Module (RDIMM) Common Standard. Item 2273.14.

Committee(s): JC-45.1

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This standard defines the electrical and mechanical requirements for 288-position, 1.1 Volt (VDD and VDDQ), DDR5 Registered (RDIMM), Double Data Rate (DDR), Synchronous DRAM Dual In-Line Memory Modules (DIMM). These Registered DDR5 SDRAM DIMMs are intended for use in server, workstation, and database environments.

Committee(s): JC-45, JC-45.1

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This standard, JESD305-R8-RCC, DDR5 Registered Dual Inline Memory Module with 8-bit ECC (EC8 RDIMM) Raw Card C Annex, defines the design detail of x4, 1 Package Rank DDR5 RDIMM with 8-bit ECC. The common feature of DDR5 RDIMM, such as the connector pinout, can be found in the JESD305, DDR5 Registered Dual Inline Memory Module (RDIMM) Common Standard.

Committee(s): JC-45, JC-45.1

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This standard, JESD305-R8-RCE, DDR5 Registered Dual Inline Memory Module with 8-bit ECC (EC8 RDIMM) Raw Card E Annex, defines the design detail of x8, 2 Package Rank DDR5 RDIMM with 8-bit ECC. The common feature of DDR5 RDIMM, such as the connector pinout, can be found in the JESD305, DDR5 Registered Dual Inline Memory Module (RDIMM) Common Standard.

Committee(s): JC-45, JC-45.1

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This standard defines specifications of DC interface parameters, switching parameters, and test loading for definition of the DDR5 Registering Clock Driver (RCD) with parity for driving address and control nets on DDR5 RDIMM and LRDIMM applications. The DDR5RCD02 Device ID is DID = 0x0052.

Committee(s): JC-40, JC-40.4

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This document defines standard specifications of DC interface parameters, switching parameters, and test loading for definition of the DDR5 Registering Clock Driver (RCD) with parity for driving address and control nets on DDR5 RDIMM applications. The DDR5RCD04 Device ID is DID = 0x0054.

Committee(s): JC-40, JC-40.4

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This standard describes the serial presence detect (SPD) values for all DDR5 memory modules. In this context, “modules” applies to memory modules like traditional Dual In-line Memory Modules (DIMMs) or solder-down motherboard applications. The SPD data provides critical information about all modules on the memory channel and is intended to be use by the system's BIOS in order to properly initialize and optimize the system memory channels.

Committee(s): JC-45

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This annex, JESD309-S0-RCA, DDR5 Small Outline Dual Inline Memory Module (SODIMM) Raw Card A Annex, defines the design detail of x8, 1 Package Rank DDR5 SODIMM. The common feature of DDR5 SODIMM such as the connector pinout can be found in the JESD309, DDR5 Small Outline Dual Inline Memory Module (SODIMM) Common Standard.

Committee(s): JC-45, JC-45.3

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This annex, JESD309-S0-RCC, DDR5 Small Outline Dual Inline Memory Module (SODIMM) Raw Card C Annex, defines the design detail of x16, 1 Package Ranks DDR5 SODIMM. The common feature of DDR5 SODIMM such as the connector pinout can be found in the JESD309, DDR5 Small Outline Dual Inline Memory Module (SODIMM) Common Standard.

Committee(s): JC-45, JC-45.3

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This annex, JESD309-S4-RCD, DDR5 Small Outline Dual Inline Memory Module with 4-bit ECC (EC4 SODIMM) Raw Card D Annex, defines the design detail of x8, 1 Package Rank DDR5 SODIMM with 4-bit ECC. The common feature of DDR5 SODIMM such as the connector pinout can be found in the JESD309, DDR5 Small Outline Dual Inline Memory Module (SODIMM) Common Standard.

Committee(s): JC-45, JC-45.3

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This standard defines the electrical and mechanical requirements for 288-pin, 1.1 V (VDD), Unbuffered, Double Data Rate, Synchronous DRAM Dual In-Line Memory Modules (DDR5 SDRAM UDIMMs). These DDR5 Unbuffered DIMMs (UDIMMs) are intended for use as main memory when installed in Computers.

Committee(s): JC-45, JC-45.3

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This annex, JESD308-U0-RCB, DDR5 Unbuffered Dual Inline Memory Module (UDIMM) Raw Card B Annex, defines the design detail of x8, 2 Package Ranks DDR5 UDIMM. The common feature of DDR5 UDIMM such as the connector pinout can be found in the JESD308, DDR5 Unbuffered Dual Inline Memory Module (UDIMM) Common Standard.

Committee(s): JC-45, JC-45.3

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This annex JESD308-U4-RCD, DDR5 Unbuffered Dual Inline Memory Module with 4-bit ECC (EC4UDIMM) Raw Card D Annex defines the design detail of x8, 1 Package Rank DDR5 UDIMM with 4-bit ECC. The common feature of DDR5 UDIMM such as the connector pinout can be found in the JESD308, DDR5 Unbuffered Dual Inline Memory Module (UDIMM) Common Standard.

Committee(s): JC-45, JC-45.3

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