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Title	Document #	Date
Addendum No. 1 to JESD79-4, 3D STACKED DRAM	JESD79-4-1B	Feb 2021
This document defines the 3DS DDR4 SDRAM specification, including features, functionalities, AC and DC characteristics, packages, and ball/signal assignments. The purpose of this specification is to define the minimum set of requirements for a compliant 8 Gbit through 128 Gbit for x4, x8 3DS DDR4 SDRAM devices. This addendum was created based on the JESD79-4 DDR4 SDRAM specification. Each aspect of the changes for 3DS DDR4 SDRAM operation was considered. Item 1727.58G Committee(s): JC-42.3C Free download. Registration or login required.
Annex D, R/C D, 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 Release Number: 30	MODULE4.20.27.D	Dec 2020
This specification defines the electrical and mechanical requirements for Raw Card D, 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. Item 2204.23 Committee(s): JC-45.4 JESD21-C Solid State Memory Documents Main Page Free download. Registration or login required.
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 Release Number: 30	MODULE4.20.27.B	Dec 2020
This specification defines the electrical and mechanical requirements for Raw Card B, 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. Item 2204.24. Committee(s): JC-45.4 JESD21-C Solid State Memory Documents Main Page Free download. Registration or login required.
SPD Annex L: Serial Presence Detect (SPD) for DDR4 SDRAM Modules, Release 6 Release 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.
Annex E, R/C E, 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 Release Number: 30	MODULE4.20.28.E	Aug 2020
This specification defines the electrical and mechanical requirements for Raw Card E, 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. Committee Item 2149.34a Committee(s): JC-45.1 JESD21-C Solid State Memory Documents Main Page Free download. Registration or login required.

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