Host-Side USB Type-C® Port Configuration Switch for USB / DisplayPort Alt Mode, with Integrated Redriver and DCI Support

The PS8743 addresses high-speed signal switching requirements for implementation of a USB Type-C connector on a USB host device that supports the VESA® DisplayPort Alt Mode Standard.  It is similar to the PS8740 but includes DCI support for system debugging.

PS8743 Block Diagram


  • Smartphones and Tablets
  • Notebooks and Desktop Personal Computers
  • Hub or Dock Devices


  • Flexible USB Type-C switching supports all signaling combinations specified in USB Type-C and VESA DisplayPort Alt Mode Standards
  • Supports USB 3.1 Gen 1 data rate of 5Gbps, and DisplayPort data rates up to 5.4Gbps (HBR2)
  • Input equalizers on all inputs to overcome high speed signal loss in PCB and external cable
  • Active drivers on all outputs to assure reliable signal integrity
  • Automatic output driver adjustment for DisplayPort path utilizing field-proven AUX interception during link training (patented by Parade Technologies)
  • Switching modes are pin controllable through GPIO or I2C control
  • Built-in MUXs and supporting circuitry of DCI debugging, supports both automatic and forced DCI mode
  • Ultra low standby power
  • Supports auto power saving for DisplayPort and USB
  • 4x6mm 40-pin QFN Halogen free RoHS package
  • Device power supply options:
    • PS8743A, dual supply:  3.3V and (1.2V or 1.35V)
    • PS8743B, single supply:  3.3V
  • Operating temperature range availability: 0° to 70°C (commercial), -40° to 85°C (industrial)
  • ESD:  Human Body Mode at 8kV