HX2VL Line Length for D+/-

[NoAr_1540581]

Hello

AN72332 describes that the line length of D+ and D- should be 75mm or less. I understand the reason for recommending the above, but as a result, without using a redriver etc.  Please tell me the max line length that passed the compliance test.

I want to know how much the line length has been extended in the past record. Past max line length result for compliance test.

Best Regards

Arai

[Sananya_14 · Accepted solution]

Hello Arai-san,

Based on compliance testing at our end in the past, and since USB 2.0 trace length depends on insertion loss of PCB, we should have maximum of 6-7 inches with 2 pairs of via. Re-driver is a must for trace length greater than 7 inches.

Best Regards,

Sananya