4:1 HDMI/DVI Switch for Sink Device

PS421 integrates 4-to-1 HDMI/DVI switch to simplify system level design and reduce system level cost for applications requiring multiple HDMI/DVI input connectors and single output device in digital TV and other emerging digital appliances.

Key Features

  • Programmable Receiver Equalization to compensate cable loss
  • Up to 14-dB for 1.65 Gbps and 16-dB for 2.25 Gbps Equalization
  • Integrated 50-ohm Active Receiver Termination
  • HDMI 1.4a compliant up to 2.25 Gbps
  • DC or AC coupling Receiver up to 2.7 Gbps, capable of supporting DisplayPort 2.7 Gbps and reduced bit rate transfer
  • Support UXGA, WUXGA, & 1080p with 8/10/12 bit deep color
  • Built-in Side-band Signals Multiplexer with 5V tolerance for SDAx/SCLx pins
  • Support both Active DDC Buffering and Passive Side-band Multiplexing
  • I2C interface for flexible host control and GPIO saving
  • EDID shadow to save system BOM cost
  • Support CEC interfacing I/O
  • Support Active Port Detection function
  • Single 3.3V Power Supply, 100-pin TQFP RoHS Package
  • 0°C to 70°C Operating Temperature Range
  • ESD: Human Body Mode at 8 kV for all receiver inputs, Machine Mode at 300 V, and Charged Device Mode at 2 kV


  • Digital TV
  • Digital Set-Top-Box
  • A/V Receiver
  • Digital DVR
  • 4-to-1 HDMI/DVI Switch Box