PS8336 – 1:2 DP v1.2 to DP/TMDS Demux

NOT RECOMMENDED FOR NEW DESIGNS
Please refer to our updated product, the PS8339

DisplayPort version 1.2 Dual-mode Source Demultiplexer with DisplayPort and TMDS Outputs

The PS8336 is a 1:2 demultiplexer IC that is connected to the output of Dual-mode DisplayPort Source device. It outputs either a repeated Dual-mode DisplayPort signal from its DisplayPort output, or an HDMI or DVI signal from it’s TMDS output. In function it is similar to the PS8312 that was developed for DisplayPort 1.1a.

Designed for the higher data rates of DisplayPort 1.2:

  • Link Rates of 5.4Gb/s (HBR2), 2.7Gb/s (HBR), and 1.62Gb/s (RBR)
  • AUX Channel rate of 720 Mb/s (Fast AUX) and 1 Mb/s (Standard AUX)

Designed for the higher data rates of HDMI 1.4a:

  • TMDS data rate of up to 3.0Gb/s
  • TMDS clock rate of up to 300MHz

When passing the Dual-mode DisplayPort signal from the device’s input to the DisplayPort output, the PS8336 behaves like a DisplayPort repeater/redriver device. When passing the input to the TMDS output, an internal level-shifter is used to produce the HDMI/DVI output from the Dual-mode DisplayPort input, which can be directly connected to the system HDMI/DVI output connector. The Dual-mode DisplayPort output also supports a level shifter-based DisplayPort-to-HDMI/DVI Dual-mode video adapter (dongle). The PS8336 can be configured to use the output hot-plug detect pins to perform automatic mode switching and device power management. An automatic output squelch function disables the output when no input signal is present.

The PS8336 can be used on the same circuit board as the Dual-mode DisplayPort Source device, or remotely such as in a notebook docking station. To ensure the maintenance of optimal signal integrity, the device includes an automatic equalizer on the input to compensate for PC board, connector and cable looses. When using the DisplayPort output, the PS8336 uses AUX channel interception, or snooping, that enables it to respond to cable drive requirements indicated by the sink device during link training. This helps to ensure DisplayPort PHY compliance at the system output receptacle as well as to ensure robust interoperability with the display device, regardless of display cable length.

APPLICATIONS

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

KEY FEATURES

  • Supports Dual-mode DisplayPort™ (DP) De-multiplexing to a Dual-mode DisplayPort and a TMDS™ output
  • Full HDMI or DVI interface support from the TMDS output
  • Compliant to the VESA DisplayPort 1.2 Standard — supports up to 5.4Gb/s link rate (HBR2), and AUX or Fast AUX
  • Compliant to HDMI 1.4a specification — supports up to 3.0Gb/s TMDS output
  • DisplayPort repeater / redriver function included for the DisplayPort output
  • Dual-mode DisplayPort operation supported by DisplayPort output
  • Automatic receiver equalization compensates for signal loss between Source device and PS8336
  • Automatic power management and output selection settings
  • Device configuration can be through pin settings or I2C slave input, which offers additional device options
  • ESD performance 8kV Human Body Model (HBM)
  • 7x7mm 56-pin QFN package
  • 0 to 85°C operation

DEVICE OPTIONS — Dual Supply or Single Supply

  • PS8336A — Dual supplies, 1.5V & 3.3V
  • PS8336B — Single 3.3V Supply