DP83867CS: DP83867CSRGZ connect with DP83867IRPAP

Mike Chiang

Part Number: DP83867CS

Tool/software:

Hi Sir/ Madam,

I am going to connect two phy chips DP83867CSRGZ and DP83867IRPAP,

Do I have to use a transformer or two transformers that has better performance? If so, do you have a reference design to help our design?

over 1 year ago

0 Mike Chiang over 1 year ago

Prodigy 40 points

I saw the reference schematic design in the datasheet and recommended the transformer part HX5008FN on page 105.

In my case, should I replace the 75 ohm to 0.1uF as phy chip side?

https://www.ti.com/lit/ds/symlink/dp83867cs.pdf?ts=1739438136604&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FDP83867CS

0 David (ASIC) Liu over 1 year ago in reply to Mike Chiang

TI__Guru**** 189101 points

Hi,

Can you provide more detail on your design application? Are you trying to connect back to back and on the same board?

Thanks

David

0 Mike Chiang over 1 year ago in reply to David (ASIC) Liu

Prodigy 40 points

Yes, I am trying to connect back to back and on the same board.

I want to establish communication between two FPGAs through their ethernet phy interface which is DP83867CSRGZ and DP83867IRPAP.

0 David (ASIC) Liu over 1 year ago in reply to Mike Chiang

TI__Guru**** 189101 points

Hi,

I would still recommend having two transformers at each end of PHY for this design following the datasheet recommendation. We have not verified if using just one transformer would work in this particular case.

Thanks

David

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DP83867CS: DP83867CSRGZ connect with DP83867IRPAP