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Part Model Electrical Guidelines for Electronic-Device Packages – XML Requirements

 JEP30-E100G Feb 2025

This standard establishes the requirements for exchanging part data between part manufacturers and their customers for electrical and electronic products. This standard applies to all forms of electronic parts. It forms part of the Part Model XML Schema, which covers the parental structure for the electrical, physical, Electrical, assembly process classification data along with materials and substances that may be present in the supplied product or subproducts. This Guideline specifically focuses on the “Electrical” sub-section of the Part Model.

For more information visit the main JEP30 webpage.

Committee(s): JC-11, JC-11.2, JC-16

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LPDDR5/5X Serial Presence Detect (SPD) Contents

Release Number: 1.0 		JESD406-5A Nov 2024

This publication describes the serial presence detect (SPD) values for all LPDDR5/5X 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. The storage capacity of the SPD non-volatile memory is limited, so a number of techniques are employed to optimize the use of these bytes, including overlays and run length limited coding.

Committee(s): JC-45

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DDR5 SERIAL PRESENCE DETECT (SPD) CONTENTS

Release Number: Release 1.3 		JESD400-5C Sep 2024

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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DDR5 SDRAM

Release Number: Version 1.31 		JESD79-5C.01 Jul 2024

Version 1.31

This standard defines the DDR5 SDRAM specification, 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 8 Gb through 32 Gb for x4, x8, and x16 DDR5 SDRAM devices. This standard was created based on the DDR4 standards (JESD79-4) and some aspects of the DDR, DDR2, DDR3, and LPDDR4 standards (JESD79, JESD79-2, JESD79-3, and JESD209-4).

Committee(s): JC-42, JC-42.3

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Low Power Double Data Rate 4 (LPDDR4)

 JESD209-4E Jun 2024

This document defines the LPDDR4 standard, 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 JEDEC compliant 16 bit per channel SDRAM device with either one or two channels. LPDDR4 dual channel device density ranges from 2 Gb through 32 Gb and single channel density ranges from 1 Gb through 16 Gb.

Committee(s): JC-42, JC-42.6

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LOW POWER DOUBLE DATA RATE (LPDDR) 5/5X

 JESD209-5C Jul 2023

This document defines the LPDDR5/LPDDR5X standard, 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 JEDEC compliant x16 one channel SDRAM device and x8 one channel SDRAM device. LPDDR5/LPDDR5X device density ranges from 2 Gb through 32 Gb. This document was created using aspects of the following standards: DDR2 (JESD79-2), DDR3 (JESD79-3), DDR4 (JESD79-4), LPDDR (JESD209), LPDDR2 (JESD209-2), LPDDR3 (JESD209-3), and LPDDR4 (JESD209-4).

Committee(s): JC-42, JC-42.6

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FBDIMM: ARCHITECTURE AND PROTOCOL

 JESD206.01 Feb 2023

Terminology update. 
This standard includes four chapters of the FBD Channel Specification (cover) Channel Overview (Chapter 2), Initialization (Chapter 3), Channel Protocol (Chapter 4), and Reliability, Availability, and Serviceability (RAS) (Chapter 5).

Patents(): There are known patent issues that are common to all FBDIMM related specifications. See document for link to FBDIMM Patents.

Committee(s): JC-40

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DEFINITION OF THE SSTE32882 REGISTERING CLOCK DRIVER WITH PARITY AND QUAD CHIP SELECTS FOR DDR3/DDR3L/DDR3U RDIMM 1.5 V/1.35 V/1.25 V APPLICATIONS

 JESD82-29A.01 Jan 2023

Terminology update.
This standard defines standard specifications of DC interface parameters, switching parameters, and test loading for definition of the SSTE32882 registered buffer with parity for driving address and control nets on DDR3/DDR3L/DDR3U RDIMM applications.

The purpose is to provide a standard for the SSTE32882 (see Note) logic device, for uniformity, multiplicity of sources, elimination of confusion, ease of device specification, and ease of use.

Committee(s): JC-40, JC-40.3, JC-40.4

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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

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LRDIMM DDR3 MEMORY BUFFER (MB)

 JESD82-30.01 Jan 2023

Terminology update.

The Load Reduced DIMM (LRDIMM) Memory Buffer (MB) supports DDR3 SDRAM main memory. The Memory Buffer allows buffering of memory traffic to support large memory capacities. Unlike DDR3 Register Buffer (SSTE32882), which only buffers Command, Address, Control and Clock, the LRDIMM Memory Buffer also buffers the Data (DQ) interface between the Memory Controller and the DRAM components.

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

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