TS3DV642: DVI Switch

Per-Åke

The TMDS341A provides fixed 8-dB input equalization and selectable 3-dB output de-emphasis to optimize system performance through 5-meter or longer DVI compliant cables.

TS3DV642 is a passive switch that does not provide any equalization and de-emphasis function. So the two parts are not function equivalent. 

Besides TS3DV642, please also take a look at the HD3SS215 which is a passive switch as well.

Thanks

David 

Hello David

The task is, DVI signal from two computers via cable max. 5m. After the switch, a display is connected via cable max. 5 m.
If I understand your answer, wouldn't this work with TS3DV642?
Is there any other circuit like TMDS341A with higher resolution?
In what solution would TS3DV642 be useful?
Maybe some stupid questions but this is a new area for me. So I am grateful for all the help.

Best regards

Per-Åke

Per-Åke

Both TS3DV642 and HD3SS215 are passive switch, so max 5m from the computer before the switch and a max 5m after the switch would effectively be 10m total cable length plus the loss of the passive switch itself. What we need to know is the max cable distance can be supported by the computer and the display. If the computer and the display can't support ~10m cable, then you need to have a re-timer on the output of the TS3DV642 or the HD3SS215 to compensate for the loss of the cable. TI has DP159 which supports AC coupled HDMI or TMDS181 which supports DC coupled HDMI.

Thanks
David 

Per-Åke

Figure 21 is for DisplayPort. For DVI, it needs to be DC coupled with the appropriate pullup resistors.

Thanks

David

One step forward and two backwards, does this mean that fig 27 is the one I should start from? Are there any aspects in Fig. 27 that I should consider? Is there any other application proposal about DVI.

Per-Åke

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