DS250DF230: DS250DF230 unused TX and Rx pin

Zhizhao Niu

Intellectual 2915 points

Part Number: DS250DF230

Hi Team,

Would you pls help to check how to handle unused RX&TX pin of retimer? Thanks a lot!

Is it ok for below terminated circuit?

B.R.

Zhizhao

over 3 years ago

0 Rodrigo Natal over 3 years ago

TI__Mastermind 19225 points

The user may either leave these unused high-speed pins floating or terminate them to GND. Note that TI supports the implementation of a retimer channel full power down register write routine. When this channel power down is applied, the hardware configuration of unused pins is even less critical.

Regards,

Rodrigo Natal

HSSC Applications Engineer

0 Zhizhao Niu over 3 years ago in reply to Rodrigo Natal

TI__Intellectual 2915 points

Hi Rodrigo,

Thanks a lot.

If I terminate them to GND, what value of resister is recommended? Is there a document describing that? If yes, would you pls send it to me? Thanks a lot!

B.R.

Zhizhao

0 Nasser Mohammadi over 3 years ago in reply to Zhizhao Niu

TI__Guru* 93670 points

Hi,

Please use 49.9-ohm Resistor from each pin to GND.

Regards,,, Nasser

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DS250DF230: DS250DF230 unused TX and Rx pin