2:1 HDMI/DVI Multiplexer For Source Device

The PS8271 is a 2:1 HDMITM/DVI multiplexer. It is ideal for switchable graphics applications in portable PCs and other applications requiring multiple HDMI/DVI inputs and a single output.  The HDMI/DVI inputs support AC coupled signals typical for a PC graphics application. The built-in equalization can compensate for the PCB losses of up to 7dB. The DDC I2C pins are bi-directional and 5V tolerant. The HPD pins are uni-directional, and OUT_HPD is 5 V tolerant.

PS8271 Web Block

Key Features

  • Provides 2:1 multiplexing for HDMI/DVI signals
  • Supports AC coupled inputs and provides a DC coupled output compliant with HDMI/DVI specifications
  • Ideal for switchable graphics applications in notebook PCs
  • Compliant with HDMI 1.4a specification up to 2.25 Gbps
  • Programmable receiver equalization to compensate for PCB and/or connector losses
  • Low Intra-pair and Inter-pair skews
  • Supports both DDC active buffering and passive switch for Side-band signals
  • Automatic Power Down management
  • Automatic squelch for fail-safe operation and power management
  • Programmable TMDS output pre-emphasis and EMI reduction
  • Separated main data and DDC switching controls for optimized Switchable Graphics
  • Single 3.3 V Power Supply
  • 0°C to 85°C Operating Temperature Range
  • ESD: HBM at 8kV, MM 400V, CDM 2kV
  • 48-pin QFN Halogen free RoHS Package


  • PC Desktop and Notebook Motherboards
  • Docking Stations
  • Graphics Cards