JEDEC JESD79-5B-2022 PDF

Full title and description

St JEDEC JESD79-5B-2022 — DDR5 SDRAM. This JEDEC standard specifies the DDR5 SDRAM device and module requirements, including features and functionality, AC and DC electrical characteristics, timing and speed definitions, package outlines and ball/pin (signal) assignments. It defines the minimum requirements for JEDEC‑compliant DDR5 SDRAM devices (typical device densities covered: 8 Gb through 32 Gb for x4, x8 and x16 organizations).

Abstract

JESD79-5B (2022) documents the DDR5 SDRAM architecture and parametric requirements intended to ensure interoperability and provide a baseline for device and module manufacturers, system designers, and test laboratories. The standard captures DC/AC parametrics, timing, package/pin assignments, signal and functional descriptions, and test conditions and methods for DDR5 devices.

General information

• Status: Superseded (later JESD79-5 revisions and updates have been published).
• Publication date: 2022 (commonly listed as September 1, 2022 in standards catalogs).
• Publisher: JEDEC Solid State Technology Association (JEDEC).
• ICS / categories: Electronics — Semiconductor devices / Integrated circuits (ICS classes: 31.080; 31.200 as applicable for semiconductor memory device standards).
• Edition / version: JESD79-5B (2022).
• Number of pages: Approximately 502 pages (published technical specification length recorded in standards catalogs).

Scope

This standard specifies the device‑level definition of DDR5 SDRAM: functional definitions, register space and mode register programming, DC and AC electrical limits and measurement methods, timing and command/response conventions, recommended test conditions, package and ball/signal assignments, and minimum device capability targets to ensure JEDEC compliance for 8 Gb–32 Gb devices in x4/x8/x16 organizations. It serves as the reference for DRAM vendors, module designers and system integrators implementing DDR5 memory.

Key topics and requirements

• Device architecture and organization (bank groups, burst length, internal banks and addressing conventions).
• DC electrical characteristics: supply rails, reference voltages, leakage and static limits for device operation and retention.
• AC timing and signaling: burst timing, command timing, setup/hold requirements and timing parameters for data I/O.
• Package and ball/pin assignments: package outlines, ball maps and recommended land patterns for DDR5 devices.
• Power management and thermal considerations, including the move of some power-management functions to the module (PMIC on DIMM architectures described at the module level).
• Test conditions and methods for parametric verification, functional tests and reliability screening.
• Interoperability guidance for memory controllers, modules and system validation (ensuring device-to-system compatibility).

Typical use and users

Primary users include DRAM device engineers and architects, memory‑module and DIMM designers, memory controller and SoC designers, system integrators and OEMs, test and validation laboratories, and standards/quality teams evaluating DDR5 device compliance and interoperability. The standard is used to design, validate and certify DDR5 components and modules for system deployment.

Related standards

Related JEDEC documents and updates include earlier and later JESD79 family releases (JESD79, JESD79-4 for DDR4, and subsequent JESD79-5 revisions such as JESD79-5C and JESD79-5D which include later updates and extensions to DDR5 timing, speeds and features). Additional related JEDEC documents cover module mechanicals, clock drivers and test methods referenced by the DDR5 spec.

Keywords

DDR5, SDRAM, JEDEC, JESD79-5B, DRAM, memory standard, AC/DC characteristics, timing, package, ball map, PMIC, DIMM, device specification, interoperability.

FAQ

Q: What is this standard?

A: JESD79-5B-2022 is the JEDEC device-level specification for DDR5 SDRAM, laying out functional, electrical, timing and package requirements for DDR5 memory devices.

Q: What does it cover?

A: It covers device architecture and organization, DC and AC parametrics, timing definitions, mode registers, package/ball assignments, test conditions and minimum requirements for JEDEC‑compliant DDR5 devices (commonly for 8 Gb–32 Gb densities in x4/x8/x16 configurations).

Q: Who typically uses it?

A: DRAM and module designers, memory controller architects, system integrators, OEMs, test labs and anyone designing or validating DDR5 memory devices or modules.

Q: Is it current or superseded?

A: JESD79-5B (2022) has been followed by additional JEDEC updates to the DDR5 family (JESD79-5C and later JESD79-5D). Catalogs and standards services list JESD79-5B as superseded by subsequent JESD79-5 revisions; users should refer to the latest JESD79-5 release for current requirements.

Q: Is it part of a series?

A: Yes — it is part of the JESD79 family of JEDEC DDR SDRAM specifications (the JESD79 series covers DDR through DDR5 with lettered revisions indicating updates and editorial/releases).

Q: What are the key keywords?

A: DDR5, SDRAM, JESD79, JEDEC, DRAM device specification, timing, AC/DC characteristics, package/ball map, PMIC, DIMM.