SATA 6Gb/s Bidirectional Repeater with I2C Control Option

PS8521A and PS8521B are bidirectional SATA repeaters that support the new SATA 6Gb/s standard, twice the speed of the previous generation SATA. As repeater (or redriver) devices they integrate two equalizer-driver channels to recondition the high-speed SATA signals. In a typically application, the PS8521A or PS8521B is placed close to an eSATA receptacle to compensate for board losses and regenerate high-quality SATA electrical signals.

PS8521 PB block

Key Features

  • Supports serial-ATA (SATA) III/SAS operation up to 6.0Gbps
  • Supports SATA Out-of-Band (OOB) Signaling with fast enter/exit time
  • Adaptive equalizer in SATA receiver enhances performance
  • Very low power consumption— PS8521A performance:
    • Active Mode – 122mW
    • Power Saving Mode – 10mW
    • Standby Mode — < 0.5mW
  • Integrated 50 ohm termination resistors for input and output
  • Programmable output pre-emphasis
  • Pin and I2C control options provide flexible host control
  • High ESD performance:
    • HBM 8kV
    • CDM 2kV
    • MM 400V
    • IEC 6100-4-2: 8kV Direct Contact Zapping
  • Single 1.5V power supply for PS8521A
  • Single 3.3V power supply for PS8521B
  • In-line signal pads for flow-through PCB layout
  • 20-pin TQFN Halogen free RoHS Package
  • 0°C to 85°C Operating Temperature


  • Desktop and laptop PCs
  • Docking Stations
  • Servers
  • Workstations
  • Data Storage Systems