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Renesas Electronics 9ZXL1232E / 9ZXL1252E Clock Buffers

Renesas Electronics 9ZXL1232E / 9ZXL1252E Clock Buffers are the second generation DB1200ZL differential buffers with enhanced performance. These Renesas Electronics clock buffer parts are pin-compatible upgrades to the 9ZXL1232A and 9ZLX1252A that offer a much-improved phase jitter performance. The 9ZXL1232E / 9ZXL1252E Clock Buffers come with an SMBus write lock feature for increased system security. These buffers also offer fixed external feedback that maintains low drift for critical QPI/UPI applications. Applications include servers, storage, networking, and Solid State Drives (SSDs).

Features

  • SMBus write lock feature increases system security
  • LP-HCSL outputs eliminate 24 resistors and save 41mm2 of an area (1232E)
  • 12 OE# pins with hardware control of each output
  • Multiple devices can share the same SMBus segment with 9 selectable SMBus addresses
  • Selectable PLL BW minimizes jitter peaking in cascaded PLL topologies
  • 100MHz and 133.33MHz PLL mode offers UPI and legacy QPI support
  • Small board footprint in 9mm x 9mm 64-QFN package
  • PCIe Clocking Architectures Supported
    • Common Clocked (CC)
    • Independent Reference (IR) with and without spread spectrum
  • Output Features
    • 12 Low-Power (LP) HCSL output pairs (1232E)
    • 12 Low-Power (LP) HCSL output pairs with 85Ω Zout (1252E)

Specifications

  • Less than 50ps cycle-to-cycle jitter
  • Less than 50ps output-to-output skew
  • Input-to-output delay is fixed at 0ps
  • Less than 50ps input-to-output delay variation
  • Phase jitter of PCIe Gen4 < 0.5ps rms
  • Phase jitter QPI/UPI > = 9.6GB/s < 0.2ps rms
  • Less than 1.0ps rms IF-UPI phase jitter

Applications

  • Servers
  • SSDs
  • Storage
  • Networking

Block Diagram

Block Diagram - Renesas Electronics 9ZXL1232E / 9ZXL1252E Clock Buffers
Paskelbta: 2018-08-21 | Atnaujinta: 2023-02-01