PCI Express® Gen 2 / SATA 6Gb/s Bidirectional Redriver

PS8556 is bidirectional signal redriver that supports both PCI Express Gen 2, with data rates up to 5.0 GT/s, and SATA, with rates up to 6 Gb/s.  The PS8556 operates with a single power supply at 1.2V, 1.35V, 1.5V (PS8556A) or 3.3V (PS8556B).  In a typically application, the PS8556 is placed close to the PCIe® or SATA connector to compensate for board losses and regenerate high-quality electrical signals for improved link reliability.

PS8556 block

Key Features

  • Supports PCIe operation at 2.5GT/s and 5.0GT/s
  • Supports serial-ATA (SATA) operation at 1.5Gbps, 3.0Gbps and 6.0Gbps
  • Pin selectable PCIe or SATA operation mode
  • Supports SATA Out-of-Band (OOB) Signaling with fast OOB enter/exit time
  • Programmable equalization to compensate for pre-channel signal loss
  • Programmable output de-emphasis
  • Pin or I2C control modes for device control flexibility
  • Low power consumption
  • Automatic power saving mode with inactive inputs
  • Automatic output squelch function
  • Integrated 50Ω input and output termination
  • Power Supply Options
    • PS8556A:  Single 1.2V, 1.35V, or 1.5V supply
    • PS8556B: Single 3.3V supply
  • 4x4mm 20-pin TQFN Halogen free RoHS Package
  • 0°C to 85°C Operating Temperature
  • ESD: Human Body Model at 8 k


  • Desktop and laptop computers
  • Docking stations
  • Servers
  • Workstations