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TMDS361B: HDMI switch questions

Robert Alfred Kecs
Prodigy 110 points
Part Number: TMDS361B
Other Parts Discussed in Thread: TMDS351, , TMDS261B, TMDS361

Tool/software:

Hi,

I am designing a HDMI switch and i only found a few buffered output ICs and none of them have a evaluation board / reference design

Below is the part list:

TMDS351
TMDS361B
TMDS261B

While browsing the forum I noticed references to TMDS361_EVM_REV_B.pdf and some other references that i did not find much data about.

Also is is possible to buy one of these eval boards?

Can you provide some reference schematics and eval board user guide / performance tests data?

Also i noticed there are far more HMI unbuffered MUXes then buffered one is there a good reason why? 

I know that these chips are intended for internal uses, but i need a short cable. Is there any data on what HDMI length is ok for these chips? 

Is there a reason why analogue MUX + retimer/redriver seems to be proffered then a 1 chip solution like the ones  found by me (TMDS351 TMDS361B TMDS261B ) ? 

On a side note maybe i am building a 2:1 HDMI 1.3+ switch box and the chips that i found are from about 2010 is there something better solution that you can recommend? 

Best regards,

Robert

  • +1
    TI__Guru**** 177846 points

    Robert

    These are pretty old devices and unfortunately the EVM are no longer available for purchase. Please see attached for the TMDS361B EVM schematic. 

    tmds361_evm_rev_c.pdf

    I assume unbuffered MUX is the same as passive MUX and buffered MUX is the same as active MUX? For passive MUX, it costs less and easier to implement than an active MUX. For a design that has the overall insertion loss within the total system loss budget, then passive MUX will an ideal solution. But for a design that has the overall insertion loss outside the total system loss budget, you can use either the 1-chip active MUX solution or mix-match between a passive MUX and a re-driver/re-timer to bring the overall insertion loss within the total system loss budget.

    TS3DV642 (Support up to HDMI2.0) and TMUXHS4612 (Support up to HDMI2.1) are the two latest passive MUX we have on our roadmap.

    Thanks

    David