DS90UH948-Q1: FPD-Link trace

Masaaki Sato

Part Number: DS90UH948-Q1

When it is necessary to use vias in the FPD-Link trace, which impedance specification should be used for the vias: 100 Ω ±10% or ±20%?

over 2 years ago

0 Hamzeh Jaradat over 2 years ago

TI__Guru** 108100 points

Of course, the tight Impedance control is better!

0 Masaaki Sato over 2 years ago

Prodigy 130 points

I understood that the tight impedance control is better.

Per the "FPD-Channel-Requirements-DS90UH94xA_Rev0p5, impedance control requirements for PCB trace is 100ohm +/- 10% and the one for landing pad and component is 100ohm +/- 20%. Which number is applied for the vias, 10% or 20%?

Additionally, In case of eDP or other high speed signal traces, if I needs to use vias in traces, is the impedance cotrol requirements applied for the vias same as traces?

Thanks

0 Hamzeh Jaradat over 2 years ago in reply to Masaaki Sato

TI__Guru** 108100 points

Hello,

Vias are part of the PCB Trace, hence 10%.

Masaaki Sato said:
Additionally, In case of eDP or other high speed signal traces, if I needs to use vias in traces, is the impedance cotrol requirements applied for the vias same as traces?

Yes, your PCB traces including vias should be impedance controlled!

+1 Masaaki Sato over 2 years ago in reply to Hamzeh Jaradat

Prodigy 130 points

Hi,

Thank you for your support.

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DS90UH948-Q1: FPD-Link trace