The PS8431 is a HDMI™2.1 12Gbps 2:1 multiplexer featuring jitter cleaning capabilities. It accommodates input Fixed Rate Link (FRL) signals up to 12Gbps over 4 lanes, supporting programmable equalization and jitter cleaning. The device, compliant with HDMI 2.1 specifications, operates in Fixed Rate Link mode with fixed link rates ranging from 3Gbps to 12Gbps. Acting as a 2:1 multiplexer, it allows dynamic port switching through GPIO control or I2C programming. The PS8431 employs a DDC Channel interception scheme to facilitate FRL link training and adjusts parameters based on intercepted data. With jitter cleaning modes for both FRL and TMDS operation, the PS8431 enhances output jitter performance. It also provides programmable receiving equalization to compensate for signal loss, supports Feed Forward Equalizer for source channel compensation, and offers various FFE modes. The device ensures flexible power management through automatic power down and squelch features.


  • HDMI 2:1 Multiplexing with jitter cleaning repeating
  • Compliant with HDMI 2.1 specification with FRL up to 12Gbps
  • Compliant with HDMI 2.0 specification with TMDS up to 6Gbps
  • AC coupling capable for level shifting.
  • SCDC interception technology for HDMI repeating.
  • Built-in DDC active buffering side-band signals.
  • Automatic Link Training support – no system level support needed.
  • Superior Intra-pair and Inter-pair de-skewing.
  • Programmable receiver equalization.
  • Link training based automatic equalization adjustment for FRL mode.
  • Automatic power down management Low power consumption.
  • Pin control or optional local I2C control
  • 3.3V and 0.9V power supply
  • 0o to 85oC operating temperature range for PS8431QFN66GTR
  • 4.4×9.7mm 66-pin QFN RoHS compliant and halogen-free package


  • Notebook/PC Motherboards
  • Docking Stations
  • TV/Monitor applications