Overview

The RG5D188 (MDB) is an MCR DIMM Data Buffer. Its primary function is to demultiplex and buffer data from the host CPU to DRAMs. It has two 4-bit data interfaces to the host, running at twice the speed of the DRAM interfaces. Each host interface multiplexes two pseudo-channels, both of which have a separate 4-bit DRAM interface. The RG5D188 supports x4 or x8 DRAMs. It also has an input-only control bus interface that is connected to an MRCD, as well as a dedicated pin for ZQ Calibration and loopback outputs for test purposes.

RG5D188 - Block Diagram
RG5D188 - Ball Configuration
RG5D188 - Ball Assignment
RG5D188 - Block Diagram
RG5D188 - Ball Configuration
RG5D188 - Ball Assignment
  • Pinout optimized MCR DIMM PCB layout
  • MCR DIMM Server speeds up to 8800MT/s
  • Supports power-down modes to conserve server power
  • Supports 1 rank per pseudo-channel in x4 and up to 2-ranks per pseudo-channel in x8 MCR DIMM configurations
  • Supports SDP and 3DS DRAM types
  • Provides access to internal control words for configuring device features and adapting to different MCR DIMM and system applications
  • Loopback and pass-through modes
  • Training support features for DQ and MDQ interfaces
  • ZQ calibration

Applications

  • MCR DIMM modules for Enterprise Servers

Documentation
Type Title Date
Product Change Notice
PCN# : 240013 Add ATK, Korea as an alternate bump and assembly location on select device from FCCSP-78
PDF 306 KB
Product Change Notice
PCN# : 240011 Add ASEK, Taiwan as alternate test location
PDF 64 KB
2 items

Design & Development

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

Explore ECAD Models
Diagram of ECAD Models

Product Options

    Processing table
    Pkg. Type
    Lead Count (#)
    Temp. Grade
    Pb (Lead) Free
    Carrier Type
    Moisture Sensitivity Level (MSL)
    Buy / Sample
    Part Number
    RG5D188B0C0GBX#BC0
    fast_forwardPreview
    memory
    view_in_ar
    Samples Available
    		 FCCSP 78 C Yes Tray 3 Get Samples,
    RG5D188B0C0GBX#HC0
    fast_forwardPreview
    memory
    view_in_ar
    Samples Available
    		 FCCSP 78 C Yes Reel 3 Get Samples,
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