MDIO bidirectional buffer 1V2 with 2.5MHz

Jason Dai

Expert 3720 points

Dear E2E,

Do we have any suitable solution can support MDIO interface with 1V2 and 2.5MHz bidirectional?

BR,

Jason

over 7 years ago

0 Rob Rodrigues over 7 years ago

TI__Mastermind 19780 points

Hi Jason,

I am not sure what you are asking for. Are you asking for a level shifter that will convert MDIO to 1.2V logic level?

Best Regards,

0 Jason Dai over 7 years ago in reply to Rob Rodrigues

TI__Expert 3720 points

Hi Rob,
whatever level shift or buffer as long as supporting 1.2V to 1.2V bidirectional solution for MDIO interface as 2.5MHz.
the reason is that the MDIO driving current in MAC is not enough.

BR,
Jason

0 Rob Rodrigues over 7 years ago in reply to Jason Dai

TI__Mastermind 19780 points

Jason,

MDIO signal is realized by an open-drain driver, so not enough driving current may be solved by a stronger pull-up. What is the resistance of the pull-up on the MDIO line?

Thanks,

Logic

Logic forum

MDIO bidirectional buffer 1V2 with 2.5MHz