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B4621B Bus Decoder for DDR2, DDR3, DDR4 Validation (64-bit)

The Keysight B4621B DDR memory bus decoder, used with a Keysight Technologies logic analyzer, allows you to decode and view transactions, commands, and data from a DDR2, DDR3 or DDR4 memory bus in your target system.

To use the B4621B Bus Decoder for DDR2, DDR3, DDR4 Validation Software, please do the following:

  1. Ensure that you have the Logic and Protocol Analyzer Software loaded.
  2. Load the B4621B Bus Decoder for DDR2, DDR3, DDR4 Validation Software
  3. Load the required add-in: DDR Setup Assistant and Eyefinder

Optional Add-ins:

  • B4622B DDR2/3/4 Protocol Compliance and Analysis Tool
  • B4623B Bus Decoder for LPDDR, LPDDR2, LPDDR3 Validation
Release Date Version Version Description
2015-08-24 06.10.0000 For installing the compatible DDR, DDR2, DDR3, DDR4 bus decoder software package(64-bit).

How to Download

  • Click the download button, select file and save.

How to Install

  • After you have downloaded the software, double click on the setup file then follow the instructions which are displayed.


  • Requires a License

Supporting Documentation

Add-On Software / Utilities


Installs on:

PC / Instrument

Operating System

  • Windows 8
  • Windows 7
  • Windows Vista
  • Windows 8.1
  • Windows Server 2018
  • Windows® Server 2018 R2
  • Windows® Server 2012
  • Windows® Server 2012 R2


Supported Instruments

  • U4154B, U4154A Logic Analyzers