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Date: 14-08-15

DisplayPort to HDMI 2.0a converter ICs with on-chip jitter cleaning

Parade Technologies has added two new ICs PS175 and PS176 to convert the video output data format from DisplayPort 1.2a or DisplayPort 1.3 to HDMI 2.0a interface standard. The PS175 converter chip is for use in mother board applications in portable and desktop systems, where as PS176 is designed for protocol adapters or “dongles”, including DisplayPort Alt Mode over USB Type-C to HDMI 2.0a adapters.

4K UHD performance at 60fps and 24 bits-per-pixel color with 4:4:4 color sampling video quality is supported by both PS175 and PS176 with the ability to handle HDMI 2.0a data rate of 6Gbit/sec. These chips can take DP 1.2a or DP 1.3 input of 4 lanes at the HBR2 (5.4Gbit/sec) link rate. HDCP 1.4 and HDCP 2.2 content protection is provided for both the DisplayPort input and HDMI output, along with the necessary HDCP repeater functionality. Internal conversion to 4:2:0 HDMI output format is provided, as is the ability to handle 8 channels of 24-bit audio at a 192kHz sample rate.

Both these chips clean up the jitter, which includes jitter ingress and ISI generated jitter from the DisplayPort transmission line during the protocol conversion process. Parade assure to get a low-jitter HDMI 2.0a output with generous compliance margin even at the 6Gbit/sec HDMI 2.0a data rate. This jitter cleaning feature enables use of longer cable also a less quality cable.

“Many semiconductor vendors are struggling with the new 6Git/sec sample rate enabled by HDMI 2.0a,” said Jimmy Chiu, Executive VP of Marketing at Parade Technologies. “Providing a robust HDMI TMDS signal at 6Gbit/sec, with ample compliance margin, requires high-speed SERDES expertise that many chip companies don’t have. So the PS175 fills this gap on the motherboard. And with the expected high adoption rate of USB-C with DisplayPort Alt Mode, the PS176 should provide a robust adapter solution capable of interoperating with various video source, display, and cable types.”

PS175 and PS176 support all the DP to HDMI protocol conversion requirements specified by the VESA DisplayPort Standard, version 1.3, and the VESA DisplayPort Alternate Mode over USB Type-C Standard, version 1.0a. This includes the ability to support CEC-Tunneling-over-AUX.

On the HDMI output side, the PS175 and PS176 support the latest HDMI 2.0a specification, including the SCDC (Status and Control Data Channel), TMDS scrambling, and the CEC receptacle interface.

The PS175 and PS176 include an on-chip microprocessor with an embedded SPI ROM for autonomous operation, requiring no control by the host.

The PS175 is packaged in a 48 pin, 6x6mm QFN package, which includes the internal SPI-ROM. A 64 pin, 7x7mm TFBGA package is also available, which does not include the SPI-ROM (an external SPI-ROM is needed for operation). Samples are available now.

The PS176 is packaged in a 48 pin QFN package, which includes the internal SPI-ROM. Samples are available now.

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