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# crosspoint switch

I want to feed 12 channels of RGB signals, 1 Y/C signal (i.e.) 38 signals as input to crosspoint switch. The available crosspoint switch (ADV3201) supports only 32 inputs : 32 outputs. I want to derive 2 outputs from any input channels that I want without any limitation. So kindly suggest me Analog devices parts to implement my logic.

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• Let me restate the problem a bit:

1) input 12 x RGB analog channels

2) input 1 x Y/C analog channels - treat this as 1 RGB analog channel

3) Total of 13 RGB analog input channels to deal with, or 3x13 = 39 input signal paths

I assume you only need 13 outputs and when you say 2 outputs of any one input channel, this will cause blocking of another input channel

4) output 13 x RGB analog channels, total of 39 output signal paths

As you've noticed the ADV3201 is only 32x32.  So you will need to use two ADV3201s where the first parts only muxes the R & G portions of the input and the second part muxes the B portion of the input channels

5) Part 1 would mux R & G or 2x13 (26) signal traces and Part 2 would mux the B or 1 x 13 (13) signal traces.

Three ADV3201s can handle 32x32 RGB muxing

This is the same approach I used to design a 32x32 HDMI matrix switch only using four 64x64 digital cross points devices.  I split the channels up into 4 parts and ran each part set through individual devices.

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• Let me restate the problem a bit:

1) input 12 x RGB analog channels

2) input 1 x Y/C analog channels - treat this as 1 RGB analog channel

3) Total of 13 RGB analog input channels to deal with, or 3x13 = 39 input signal paths

I assume you only need 13 outputs and when you say 2 outputs of any one input channel, this will cause blocking of another input channel

4) output 13 x RGB analog channels, total of 39 output signal paths

As you've noticed the ADV3201 is only 32x32.  So you will need to use two ADV3201s where the first parts only muxes the R & G portions of the input and the second part muxes the B portion of the input channels

5) Part 1 would mux R & G or 2x13 (26) signal traces and Part 2 would mux the B or 1 x 13 (13) signal traces.

Three ADV3201s can handle 32x32 RGB muxing

This is the same approach I used to design a 32x32 HDMI matrix switch only using four 64x64 digital cross points devices.  I split the channels up into 4 parts and ran each part set through individual devices.

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