Global Standards for the Microelectronics Industry
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| Title | Document # | Date |
|---|---|---|
DDR4 NVDIMM-P BUS PROTOCOL |
JESD304-4.01 | Jan 2021 |
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 Free download. Registration or login required. |
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BYTE ADDRESSABLE ENERGY BACKED INTERFACE |
JESD245E | Apr 2022 |
This standard specifies the host and device interface for a DDR4 NVDIMM-N, which is a DIMM that achieves non-volatility by copying SDRAM contents into non-volatile memory (NVM) when host power is lost using an Energy Source managed by either the module or the host. This standard is used in conjunction with JESD248. Item 2233.54G Committee(s): JC-45.6 Free download. Registration or login required. |
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DDR4 NVDIMM-N DESIGN SPECIFICATION |
JESD248A | Mar 2018 |
This standard defines the electrical and mechanical requirements for 288-pin, 1.2 Volt (VDD), Double Data Rate, Synchronous SDRAM Nonvolatile Dual In-Line Memory Modules with NAND Flash backup (DDR4 NVDIMM-N). A DDR4 NVDIMM-N is a Hybrid Memory Module with a DDR4 DIMM interface consisting of DRAM that is made nonvolatile through the use of NAND Flash. NVDIMM-N modules adhere to the Byte Addressable Energy Backed Interface Standard, JESD245, that provides detailed logical behavior, interface, and register definitions. These DDR4 NVDIMM-N modules are intended for use as main memory or storage when installed in PCs. This standard is used in conjunction with JESD245. Item 2233.27B Committee(s): JC-45.6 Available for purchase: $80.00 Add to Cart Paying JEDEC Members may login for free access. |
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SPD Annex L: Serial Presence Detect (SPD) for DDR4 SDRAM Modules, Release 5Release Number: 29 |
SPD4.1.2.L-5 | Aug 2019 |
This annex describes the serial presence detect (SPD) values for all DDR4 modules covered in Document Release 5. Differences between module types are encapsulated in subsections of this annex. These presence detect values are those referenced in the SPD standard document for ‘Specific Features’. Item 2276.05. Committee(s): JC-45 JESD21-C Solid State Memory Documents Main Page Free download. Registration or login required. |
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SPD Annex L: Serial Presence Detect (SPD) for DDR4 SDRAM Modules, Release 6Release Number: 30 |
SPD4.1.2.L-6 | Nov 2020 |
This annex describes the serial presence detect (SPD) values for all DDR4 modules covered in Document Release 6. Differences between module types are encapsulated in subsections of this annex. These presence detect values are those referenced in the SPD standard document for ‘Specific Features’. Item 2220.01H. Committee(s): JC-45 JESD21-C Solid State Memory Documents Main Page Free download. Registration or login required. |
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SPD Annex L, Serial Presence Detect (SPD) for DDR4 SDRAM Modules, Release 4Release Number: 27A |
SPD4.1.2.L-4 | Aug 2019 |
This annex describes the serial presence detect (SPD) values for all DDR4 modules covered in Document Release 4. Differences between module types are encapsulated in subsections of this annex. These presence detect values are those referenced in the SPD standard document for ‘Specific Features’. Item 2220.01G. This is an editorial revision to the publication in January 2017. Committee(s): JC-45 JESD21-C Solid State Memory Documents Main Page Free download. Registration or login required. |
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SPD Annex L: Serial Presence Detect (SPD) for DDR4 SDRAM Modules, Release 3Release Number: 25 |
SPD4.1.2.L-3 | Sep 2015 |
This annex describes the serial presence detect (SPD) values for all DDR4 modules. Differences between module types are encapsulated in subsections of this annex. These presence detect values are those referenced in the SPD standard document for ‘Specific Features’. The following SPD fields will be documented in the order presented in section 1.1 with the exception of bytes 128~255 which are documented in separate annexes, one for each family of module types. Further description of Byte 2 is found in Annex A of the SPD standard. Item 2220.01F. Committee(s): JC-45 JESD21-C Solid State Memory Documents Main Page Free download. Registration or login required. |
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DDR5 Serial Presence Detect (SPD) ContentsTerminology update Release Number: Version 1.1 |
JESD400-5A.01 | Jan 2023 |
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 used by the system's BIOS in order to properly initialize and optimize the system memory channels. Committee(s): JC-45 Free download. Registration or login required. |
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DDR4 REGISTERING CLOCK DRIVER (DDR4RCD02) |
JESD82-31A.01 | Jan 2023 |
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 Free download. Registration or login required. |
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DDR4 DIMM Product Label, Hybrid, Pre-Production, DDR4ERelease Number: 29 |
DIMM-LABEL4.19.4 | Aug 2019 |
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 Free download. Registration or login required. |
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Backup Energy Module Standard for NVDIMM Memory Devices (BEM) |
JESD315 | Dec 2021 |
This standard defines the functional requirements of Backup Energy Module (BEM), henceforth referred to as BEM in this standard. This module shall be used to provide backup power to the Industry Defined Storage Array Controller Cards and NVDIMM-n as applicable. All standards are applicable under all operating conditions unless otherwise stated. Item 2279.03 Committee(s): JC-45 Free download. Registration or login required. |
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DDR5 DIMM Labels |
JESD401-5 | May 2022 |
This standard for labels applies to all DDR5 memory modules to fully describe the key attributes of the module. The label can be in the form of a stick-on label, silk screened onto the assembly, or marked using an alternate customer-readable format, Item 2268.02C Committee(s): JC-45 Free download. Registration or login required. |
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288-Pin, 1.2 V (VDD), PC4-1600/PC4-1866/PC4-2133/PC4-2400/PC4-2666/PC4-3200 DDR4 SDRAM Unbuffered DIMM Design SpecificationRelease Number: 29 |
MODULE4.20.26 | Aug 2019 |
This specification defines the electrical and mechanical requirements for the 288-pin, 1.2 Volt (VDD), Unbuffered, Double Data Rate, Synchronous DRAM Dual In-Line Memory Modules (DDR4 SDRAM UDIMMs). These DDR4 Unbuffered DIMMs are intended for use as main memory when installed in PCs. Item 2241.13A Committee(s): JC-45.3 JESD21-C Solid State Memory Documents Main Page Free download. Registration or login required. |
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DDR4 DATA BUFFER DEFINITION (DDR4DB02) |
JESD82-32A | Aug 2019 |
This standard defines standard specifications for features and functionality, DC and AC interface parameters and test loading for definition of the DDR4 data buffer for driving DQ and DQS nets on DDR4 LRDIMM applications. Any TBDs as of this document, are under discussion by formulating committee. Item 314.11D *If you downloaded this file between 8/7/2019 and 8/14/2019, please download again, the publication date on the document was incorrected and has been fixed. 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 Free download. Registration or login required. |
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260-Pin, 1.2 V (VDD), PC4-1600/PC4-1866/PC4-2133/PC4-2400/PC4-2666/PC4-3200 DDR4 SDRAM SODIMM Design SpecificationRelease Number: 29 |
MODULE4.20.25 | Aug 2019 |
This document defines the electrical and mechanical requirements for 260 pin, 1.2 V (VDD), Small Outline, Double Data Rate, Synchronous DRAM Dual In-Line Memory Modules (DDR4 SDRAM SODIMMs). These DDR4 SODIMMs are intended for use as main memory when installed in PCs, laptops and other systems. This document also contains the DDR4 DIMM Label, Ranks Definition. Item 2224.13A Committee(s): JC-45.3 JESD21-C Solid State Memory Documents Main Page Free download. Registration or login required. |
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PMIC50x0 POWER MANAGEMENT IC SPECIFICATION, Rev. 1.83 |
JESD301-1A.01 | Oct 2022 |
Definition of PMIC5000, PMIC5010 Voltage Regulator Device for Memory Module Applications. Item 325.29D. Minor Editorial Revision, see Annex. Committee(s): JC-40.1 Free download. Registration or login required. |
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288-Pin, 1.2 V (VDD), PC4-1600/PC4-1866/PC4-2133/PC4-2400/PC4-2666/PC4-3200 DDR4 SDRAM Load Reduced DIMM Design SpecificationRelease Number: 25 |
MODULE4.20.27 | Aug 2015 |
Item 2204.07 This specification defines the electrical and mechanical requirements for 288-pin, 1.2 Volt (VDD), Load Reduced, Double Data Rate, Synchronous DRAM Dual In-Line Memory Modules (DDR4 SDRAM LRDIMMs). These DDR4 Load Reduced DIMMs (LRDIMMs) are intended for use as main memory when installed in PCs. Committee(s): JC-45.4 JESD21-C Solid State Memory Documents Main Page Free download. Registration or login required. |
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288-Pin, 1.2 V (VDD), PC4-1600/PC4-1866/PC4-2133/PC4-2400/PC4-2666/PC4-3200 DDR4 SDRAM Registered DIMM Design SpecificationRelease Number: 29 |
MODULE4.20.28 | May 2019 |
This specification defines the electrical and mechanical requirements for 288-pin, 1.2 Volt (VDD), Registered, Double Data Rate, Synchronous DRAM Dual In-Line Memory Modules (DDR4 SDRAM RDIMMs). These DDR4 Registered DIMMs (RDIMMs) are intended for use as main memory when installed in PCs. Item 2149.05E Committee(s): JC-45.1 JESD21-C Solid State Memory Documents Main Page Free download. Registration or login required. |
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