PS8121ED – 1:1 DP Repeater

Dual Mode DisplayPort Repeater

PS8121ED is a 1-to-1 DisplayPort™ (DP) Repeater designed to be used in a DisplayPort Source device. In application, it is placed near the DisplayPort output receptacle to provide a low distortion DisplayPort output signal. The PS8121ED removes distortion from the internally distributed DisplayPort signal caused by system PCB traces and internal connectors. It can be used in a notebook docking station, for example, where the DisplayPort signal originating from within the notebook PC can become distorted as it passes through the docking station connector and extra PCB traces. It can also be used on a PC motherboards where long traces exist between the integrated graphics controller and DisplayPort receptacle. By removing distortion that would otherwise be passed through the DisplayPort output receptacle, system interoperability and standard compliance is greatly improved.

PS8121ED Web Block

Key Features

  • Fully compliant to the VESA DisplayPort™ 1.1a Specification
  • Serves as a repeater within a DisplayPort Dual Mode Source device or docking station
  • Improves signal quality at the system DisplayPort output receptacle
  • Programmable input equalizer compensates for PCB and/or internal connector losses
  • Supports DisplayPort link training by adjusting output amplitude and pre-emphasis based on intercepted Aux Channel commands (patent pending)
  • All four levels of output amplitude and pre-emphasis supported
  • Supports 1, 2 or 4 lane operation at 1.62 or 2.7 Gbps link rate
  • Low Intra-pair and Inter-pair skew
  • Pin-selectable device configuration, or optional I2C control for full feature flexibility
  • Single 3.3 V Power Supply
  • 48-pin QFN RoHS Package
  • 0°C to 85°C Operating Temperature Range
  • ESD: Human Body Mode at 8 kV, Machine Mode at 400 V, and Charged Device Mode at 2 kV


  • PC Motherboard / Graphics Card
  • Docking Station
  • 1-to-1 DP Repeater