TUSB211: The maximum USB cable length of TUSB211

Philip%20Park

Intellectual 1175 points

Part Number: TUSB211

Dear All,

I have some questions for TUSB211.

1.What is the maximum USB cable length one TUSB211 can support?

2. If several TUSB211 are used, What is the maximum USB cable length?

3.Could you provide the detail principle of TUSB211 ?

over 9 years ago

0 Diego Cortes over 9 years ago

TI__Mastermind 36085 points

Hello Phillip,

The TUSB211 improves the signal's slew rate but not the DC level, so the maximum trace length will depend also on the parasitic resistance of the cable. We have positive results on 10m cable using two TUSB211 in cascade (one at each side of the cable).

Regards,

Diego.

0 Philip%20Park over 9 years ago in reply to Diego Cortes

TI__Intellectual 1175 points

Thank you. Diego,
Our customer made their TUSB211 board.
Cable length 3m => using one TUSB211 board, we got the pass at eye diagram.
Cable length 5m => using one TUSB211 board, we got the fail at eye diagram.
Cable length 5m=> using two TUSB211 board at end side, We got the fail at eye diagram. We get worse result than using one TSUB211.

Could you advise to solve this issue?

And could you provide the detail principle of TUSB211?

0 Diego Cortes over 9 years ago in reply to Philip%20Park

TI__Mastermind 36085 points

Hello Philip,

Please share the results and the configuration you have on both TUSB211.

Regards,

Diego.

0 Philip%20Park over 9 years ago in reply to Diego Cortes

TI__Intellectual 1175 points

Diego,

What is Cable length one TUSB211 support with passing near end masks?
what is Cable length two TUSB211 with passing near end masks?

0 Diego Cortes over 9 years ago in reply to Philip%20Park

TI__Mastermind 36085 points

Hello Philip,

for single TUSB211 is 2-3 meters max to pass Near-End Eye. Using two TUSB211 is actually about the same due to voltage drop across the cable, the better quality cable can extend to ~4 meters with 2.

Regards,

Diego.

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TUSB211: The maximum USB cable length of TUSB211