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Demultiplexers support DisplayPort 1.2, HDMI 1.4a

Posted: 15 Mar 2011 ?? ?Print Version ?Bookmark and Share

Keywords:DisplayPort? demultiplexer? IC? HDMI 1.4? video?

Parade Technologies Ltd has introduced DisplayPort demultiplexer ICs that are compliant with the higher data rates and capabilities of DisplayPort 1.2 and HDMI 1.4a. The PS8336A and PS8336B devices integrate a single Dual Mode DisplayPort 1.2 receiver with two transmitters: a DisplayPort 1.2 compliant output and a HDMI 1.4a compliant TMDS output.

DisplayPort 1.2 offers a maximum data rate of 5.4Gbit/s, enabling higher resolution displays, multiple displays on a single channel and higher resolution 3D displays. It also added a Fast AUX mode to the AUX Channel that increases the data rate of this bi-directional side band signal from 1Mbit/s to 720Mbit/s. The PS8336A/B devices support both the 5.4Gbit/s video rate and 720Mbit/s Fast AUX speed when the DisplayPort output is selected.

When using the HDMI output, the PS8336A/B supports TMDS data rates of up to 3Gbit/s, enabling HDMI pixel rates up to 300MHz. This provides support for the new, higher resolution 1,080p 60fps 3D display modes described in the HDMI 1.4a specification.

The devices are designed to accommodate Dual-Mode DisplayPort operation. The internal demultiplexer switches the Dual Mode DisplayPort Source between DisplayPort and TMDS outputsthe TMDS output is compatible with both HDMI and DVI displays. When using the DisplayPort output, the devices behave like a DisplayPort repeater/redriver. Parade's own AUX Channel interception technology is used to passively monitor the DisplayPort training signals between the Source and Sink and automatically set DisplayPort lane count, amplitude, and output pre-emphasis levels for the Main Link. For the DisplayPort input receiver, these devices incorporate Parade's proven equalizer technology for input signal conditioning, enabling automatic compensation for variations in cable, connector and PCB trace signal losses to ensure performance robustness.

Parade's demultiplexers support all DisplayPort power management modes, including standby and sleep modes when the device is inactive. The devices also support a Suspend Mode when the device recognizes an unplugged display or the absence of video Source signals. The devices also incorporate automated power management features for HDMI/DVI operation. These include an automatic squelch mode that suspends the output drivers when the device detects input signal loss, and automated power down when the device detects the absence of a connected display.

The PS8336A uses a dual-voltage 1.5V and 3.3V power supply; the PS8336B uses a single 3.3V power supply. They come in 7 x 7mm 56-pin QFN package.

The PS8336A and PS8336B devices are sampling now, and production volumes will be available in June 2011. They will be available for $1.75 each in high volume.

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