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Part Number: TDP158
I am looking for HDMI2.0 re-driver, which will be used in a large sized PCB to optimize the signal integrity. But it looks TDP158 is not dedicate for HDMI to HDMI re-driver. While, TMDS181 is a re-timer. So which device is suitable for my user case?
The TMDS181 can support redriver mode up to 3.4G. You can use the TDP158, but you have to AC couple the TDP158 input, and then place external termination to 3.3V between the HDMI source and the AC coupling caps. This external termination creates a double termination that will cut the signal amplitude, so the HDMI source has to boost its output amplitude to compensate for the cut.
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In reply to David (ASIC) Liu:
One other thing to note with the TDP158 is that the DP158 does not have a Adaptor ID Buffer, and HDMI ID code will be read as 0x00h when Adaptor ID Buffer is being read. HDMI ID code of 0x00h would indicate this to be a DVI interface, and audio is not supported over DVI. If they can force the source to be HDMI instead DVI, then both the video and the audio will be carried over the HDMI.
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