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Texas Instruments CDCDB2000 20-Output Clock Buffers

Texas Instruments CDCDB2000 20-Output Clock Buffers are DB2000QL-compliant buffers. The CDCDB2000 clock buffers distribute the reference clock for PCIe Gen 1-5, Quick-Path Interconnect (QPI), Ultra-Path Interconnect (UPI), SAS, and SATA interfaces. These clock buffers come with SMBus, Side-Band Interface (SBI), and eight output enable pins that allow the configuration and control of all the 20 outputs individually. The Texas Instruments CDCDB2000 buffers feature hardware-controlled low power mode and offer less than 0.08ps RMS additive phase jitter after the DB2000QL filter. These clock buffers are available in a 6mmx6mm TLGA/GQFN package with 80 leads.

Features

  • DB2000QL-compliant
  • Offer 20 LP-HCSL outputs
  • Distributes the reference clock for the interfaces
    • PCIe Gen 1 to 5
    • QPI
    • UPI
    • SAS
    • SATA
  • Eight hardware Output Enable (OE#) controls
  • Support PCIe Gen 4 and Gen 5 Common Clock (CC) and Individual Reference (IR) architectures
    • Spread spectrum-compatible
  • Hardware-controlled low power mode (PD#)
  • Nine selectable SMBus addresses

Specifications

  • < 0.08ps RMS additive phase jitter after the DB2000QL filter
  • < 50ps cycle-to-cycle jitter
  • < 50ps output-to-output skew
  • < 3ns input-to-output delay
  • 3.3V core and IO supply voltages
  • < 600mW power consumption
  • 6mmx6mm and 80-pin TLGA/GQFN package

Applications

  • Microserver and tower server
  • Storage area network and host bus adapter card
  • Network-attached storage
  • Hardware accelerator

Block Diagram

Block Diagram - Texas Instruments CDCDB2000 20-Output Clock Buffers
Published: 2019-12-26 | Updated: 2025-01-16