DisplayPort (Dual Mode) to HDMI/DVI Level Shifter

The PS8121E is a fully integrated AC to DC level shifter designed for HDMI and DVI transmission applications. Designed for a wide variety of applications, the device is ideal for DisplayPort level-shifting cable adapter (or “dongle”) devices. It can be configured specifically for a dual mode DisplayPort to HDMI cable adapter, or a dual mode DisplayPort to DVI cable adapter. Consuming only 500mW, it can be powered directly by the DisplayPort input connection, so no other external power supply is needed.

PS8121E web block

Key Features

  • Converts AC coupled HDMI or DVI signals into spec compliant DC coupled HDMI or DVI signals
  • Ideal for dual mode DisplayPort to HDMI/DVI cable adapter products
  • Pin selectable HDMI or DVI mode (provides HDMI ID at DDC address 0x80)
  • Compliant to DisplayPort Interoperability Guideline
  • Compliant to HDMI 1.4a specification with up to 2.25Gbps data rate
  • Low 500mW consumption enables powering from DisplayPort connection only
  • Programmable receiver equalization adjustment to compensate for PCB and/or connector losses in the input signal path
  • Integrated 50Ω input termination
  • Low Intra-pair and Inter-pair skew
  • Built-in, bi-directional DDC active buffer with 5V tolerant interface
  • Pin configurable, or I2C control option for increased flexibility and configuration
  • Single 3.3V Power Supply
  • 48-pin 7x7mm QFN RoHS Package
  • 0°C to 70°C Operating Temperature Range
  • ESD: Human Body Mode at 8kV


  • Dual Mode DisplayPort to HDMI Cable Adapter
  • Dual Mode DisplayPort to DVI Cable Adapter
  • Format conversion on PC mother board or graphics card
  • Format conversion within Notebook PC Docking Station
  • AC-to-DC converter PHY for embedded HDMI/DVI transmitters
  • DVD Players or Set-top boxes