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SN65DP149: HDMI retimer/redriver drop in replacemnets

Robert Alfred Kecs
Prodigy 110 points
Part Number: SN65DP149
Other Parts Discussed in Thread: SN65DP159, TDP158, TMDS181, TMDS171, TDP0604, TDP1204

Tool/software:

Hi,

I noticed that most retimer/redriver are in a QFN 40 or QFN 48 capsule.

I think i found a few combination where they are drop in replacements.

So is there a list of drop in replacement parts? 

like IC1 2 3 4 are drop in replacements for each other 

Also is there a guide to when to use a HDMI retimer vs redriver and IF i need any to begin with?

I am asking since i was thinking that if i get a pair of drop in replacement chips where one is a retimer and

the other is a redriver i can test both with the same PCB and in production use the most suitable one.

As a note as of now i am just in the planning stage and i dont know the input and output cable length and type.

As for HDMI speed i need HDMI 1.3 or better  (1.2 would be enough but i want some space for later upgrades in terms of monitor ).

Also is there any way to estimate HMDI cable loses ? Asking since i might be able to bet cable length estimates in the near future.

Best regards,

Robert

  • +1
    TI__Guru**** 178126 points

    Robert

    For AC-coupled input or DP++ that is pin-to-pin compatible, TDP158 (6G redriver) and SN65DP159 (6G retimer)

    For DC-coupled input, we do not have a 6G re-driver solution, we only have re-timer solution that is pin-to-pin compatible with each other: TMDS171 (3.4G re-timer), TMDS181 (6G re-timer).

    To support both DC and AC coupled input, we only have re-driver solution that is pin-to-pin compatible. TDP0604 (6G re-driver), TDP1204 (12G re-driver). 

    For HDMI cable, you may have to contact the cable vendor for the loss or measure it using a VNA. I am not aware of a method to estimate the cable loss.

    Thanks

    David

  • 0 in reply to David (ASIC) Liu
    Prodigy 110 points

    Hi David,

    THX for the help, regarding if it is DC or AC coupled i can account for that in circuit.

    I only have a few questions regarding how TI markets/rates this type of chip:

    When you say 6G i assume 6Gbps but is that 6Gbps per data channel or per entire chips ?

    As in is it 6Gbps for all the 3 data part combines so 2Gbps per lane or is it 6Gbps per lane for a total of 18Gbps. 

    From what i understand it should be the latter.

    Asking since i want to make sure i understand well the specifications of the chip. ( tho in this can either can work in my application, but still i want to know well what i am working with).

    Best regards,

    Robert

  • 0 in reply to Robert Alfred Kecs
    TI__Guru**** 178126 points

    Robert

    Your understanding is correct, the TDP158, 159, TMDS181, TDP0604 are all 6G per lane, give you total bandwidth of 18Gbps.

    Thanks

    David