**Part Number:**DRA829J-Q1

**Other Parts Discussed in Thread:**DRA829J

Hi TI,

I'm looking at implementing four 2.5GBASE-T networks on a DRA829J, and would appreciate some clarifications if possible.

- Table 12-251 SerDes Supported Standards in the J721E TRM (SPRUIL1C) shows the SGMII interface as having both 1.25Gbps and 2.5Gbps bit rates. My understanding is that for SGMII to support 2.5GBASE-T, the baudrate needs to be 3.125Gbaud to deliver 2.5Gbit throughput with 8b/10b encoding. Can you please clarify whether this is correct, and if so, whether 2.5GBASE-T (at 2.5Gbit/s) is supported?
- If 2.5GBASE-T is supported at the full data rate, is there a suitable quad port 2.5GBASE-T PHY that you could recommend? I've come across the MaxLinear GPY245 which appears to be suitable, but it provides four SGMII+ interfaces, which seem to be SGMII interfaces that support 3.125Gbaud. Assuming that the answer to question 1 above is that 3.125Gbaud is supported, I imagine this PHY would be suitable and the DRA829J SGMII SerDes lanes would be compatible with MaxLinear's 'SGMII+' interfaces?

Thanks!