PS8925 – PCI Express Gen 4 16Gbps 4-Lane Retimer

The PS8925 is a bidirectional, 4-lane retimer (using a total of 8 data channels) that supports PCIe (PCI Express) Gen 4, with data rates up to 16Gbps.  It is low-latency capable and is ideal for applications such as workstations and enterprise data center systems including storage and servers.

As a retimer, the PS8925 removes unwanted and potentially error-inducing signal distortion introduced by cross-talk or system noise, or from physical interface loss including PCIe interconnect cables, PCB traces, and connectors.  The device enhances data transmission reliability and enables longer PCIe interconnect cables and/or PCB traces, enabling system scalability.

Key Features

  • PCI Express 4.0 spec compliant retimer
  • Supports PCI Express operation at 2.5Gbps, 5Gbps, 8 Gbps and 16Gbps
  • Supports 4 bidirectional lanes using 8 differential channels
  • Compliant with Intel publication PCI Express 4.0 Retimer Supplemental Features and Standard BGA Footprint (Revision 004, June 2018)
  • Low power consumption
  • No heat sink required for operation
  • Adaptive CTLE and DFE equalizers compensate up to 30dB channel loss at 8GHz
  • Configurable modes of operation
    • FPR – Full Protocol Retimer
    • PABR – Protocol Aware Bit-level Retimer
  • Near Zero Latency; 2ns typical in PABR mode
  • Enhanced per-channel voltage and timing margining
  • Supports dynamic link configuration; Single Link 1×1, 1×2, 1×4; Dual links 2×1, 2×2
  • Autonomous segmented link training in FPR mode
  • Supports SRIS/SRNS systems
  • Supports lane reversal and hot plug
  • Supports SMBus configuration and external EEPROM configuration loading
  • 14 selectable addresses for SMBus control
  • Supports power saving states; L1 (standby) and L1PM (sleep)
  • Supports JTAG debug port; Follows IEEE 1149.1 & IEEE 1149.6
  • 0.9V and 1.8V power supplies
  • 5.5mm x 10mm 146-ball BGA package
  • -40 to +85 deg. C operating temperature range

Applications

  • Servers
  • Data Centers and Storage
  • Workstations