TDP142: Schematic check

Tommy Tzeng

Part Number: TDP142
Other Parts Discussed in Thread: TMUXHS4512, TMDS181

Hi Sir,

we will use the TDP142 redriver for the DP1.4 interface applciation.

we have reviewed the circuit and did not find any issue, could you please help review it and advise if there any problem or if any modify need? tks.

PAGS-2834XAF DP HDMI_1.pdf 2834 DP_HDMI.jpg

1 month ago

0 David (ASIC) Liu 30 days ago

TI__Guru**** 187581 points

Hi,

Any chance you can share the schematic with the searchable net name? This will help to make sure all the connections are correct.

Thanks

David

0 Tommy Tzeng 29 days ago in reply to David (ASIC) Liu

Mastermind 6280 points

Hi David,

ok, got it.

i will provide the original PDF file first. and will try ask the customer to provide the complete smart card-side circuit,tks.

5381.PAGS-2834XAF DP HDMI.PDF

0 David (ASIC) Liu 29 days ago in reply to Tommy Tzeng

TI__Guru**** 187581 points

Hi,

Please see attached TDP142 portion of the schematic for my review comment. I also asked our MUX team for their review on TMUXHS4512.

PAGS-2834XAF DP HDMI_TI_Reviewed_04282026.pdf

Thanks

David

+1 Nir Gilgur 29 days ago in reply to Tommy Tzeng

TI__Mastermind 25545 points

Hello Tommy,

U286, the TMUXHS4512's I/Os are not AC coupled.
Are the caps present somewhere else in the schematic?

Other than that, I don't see any issues with the two TMUXHS4512s.
Decoupling caps are present by the supply pin.
Logic seems to setup correctly.
The other I/Os are connected fine and the devices are grounded properly.

Thanks,

Nir

0 Tommy Tzeng 23 days ago in reply to Nir Gilgur

Mastermind 6280 points

Hi Nir,

about the U286 Mux switch, this switch is used for the TMDS181 retimer, the source signal support DC coupled operation, is it still need to add capacitor?

thanks for you help and support.

+1 Nir Gilgur 23 days ago in reply to Tommy Tzeng

TI__Mastermind 25545 points

Hello Tommy,

What do you mean by "the source signal support DC coupled operation"?

Do you mean the retimer has integrated capacitors for AC coupling?
If that is the case, then there is no need to add external caps.

Thanks,

Nir

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TDP142: Schematic check