DDR4RCD01 JEDEC-compliant DDR4 register for RDIMM & LRDIMM operation up to DDR4-2400


Product details


Function Memory interface Output frequency (Max) (MHz) 1200 Number of outputs 68 Output supply voltage (V) 1.2 Core supply voltage (V) 1.2 Features DDR2 register Rating Catalog Output type CMOS Input type CMOS open-in-new Find other Clock buffers

Package | Pins | Size

NFBGA (ZNR) 253 108 mm² 13.5 x 8 open-in-new Find other Clock buffers


  • DDR4RCD01 JEDEC Compliant
  • DDR4 RDIMM and LRDIMM up to
  • 32 Bits 1-to-2 Register Outputs
  • 1-to-4 Differential Clock Buffer
  • 1.2V Operation
  • PLL with Internal Feedback
  • Configurable Driver Strength
  • Scalable Weak Driver
  • Programmable Latency
  • Output Driver Calibration
  • Address Mirroring and Inversion
  • DDR4 Full-Parity Operation
  • On-Chip Programmable VREF Generation
  • CA Bus Training Mode
  • I2C Interface Support
  • Up to 16-Logical Ranks Support
    for 3DS RDIMMs
    and LRDIMMs
  • Up to 4 Physical Ranks Support
    for RDIMMs and

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The CAB4 is 32-bit 1:2 Command/Address/Control Buffer and 1:4 differential Clock Buffer designed for operation on DDR4 registered DIMMs with a 1.2 V VDD mode.

All inputs are pseudo-differential using external or internal voltage reference. All outputs are full swing CMOS drivers optimized to drive 15 to 50 Ω effective terminated traces in DDR4 RDIMM, LRDIMM and 3D-Stacked DIMM applications. The clock outputs, command/address outputs, control outputs, data buffer control outputs can be enabled in groups, and independently driven with different strengths to compensate for different DIMM net topologies. The DDR4 Register operates from a differential clock (CK_t and CK_c). Inputs are registered at the crossing of CK_t going HIGH, and CK_c going LOW. The input signals could be either re-driven to the outputs if one of the input signals DCS[n:0]_n is driven LOW or it could be used to access device internal control registers when certain input conditions are met.

The device is characterized in the operating temperature range from –40°C to 95°C.

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Technical documentation

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Type Title Date
* Datasheet CAB4A Registering Clock Driver with Parity for DDR4/DDR4L RDIMM & LRDIMM Applica datasheet (Rev. B) Oct. 11, 2013

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