DS90UB901Q-Q1: Interfacing to SFP fiber

Hello,

Dmitry Babayev said:

1. Is there a concern interfacing these ICs to SFP, other than no bidirectional comm for back-controls

I am not familiar with this particular use case. Could you possibly provide me with more details on your system architecture?

Dmitry Babayev said:

b. what is life expectancy on these parts?

We do not have any plans to EOL this part.

Dmitry Babayev said:

2. Where can I get VHDL code to interface to these ICs

The DS90UB901Q can only be interfaced with I2C.

Dmitry Babayev said:

a. Is there AMD/Xilinx IP?

We do not offer Linux drivers alongside our parts.

Best,

Nikolas

The following is an example SFP spec that we want to interface:

1000BASE-SX 850nm SFP Transceiver Datasheet | FS

RD-/+: These are the differential receiver outputs. They are AC coupled 100Ω differential lines which should be terminated with 100Ω (differential) at the user SERDES. The AC coupling is done inside the module and is thus not required the host board. The voltage swing on these lines will be between 400 and 2000 mV differential (200 –1000 mV single ended) when properly terminated.

TD-/+: TD-/+: These are the differential transmitter inputs. They are AC-coupled, differential lines with 100Ωdifferential termination inside the module. The AC coupling is done inside the module and is thus not required on the host board. The inputs will accept differential swings of 400–2000mV (200–1000mV single- ended).

The reason for asking for life expectancy is that we need to design for 10-20 yrs and if FPGA SerDes are replacing these parts at a fast rate, then I would be afraid to use these.

There has to be someone who wrote VHDL or some other code to interface to both parallel and I2C for these devices. It is primarily used for image traffic but we want to have proprietary protocol (something simple).

Are there any other SerDes devices that are simple protocol and widely used? We don't particularly need FDT Link.

Hi Dmitry,

It looks like this use case may be better suited for our Ethernet product line. I am reassigning this thread accordingly and  someone from their team will follow-up with you shortly.

Best,

Nikolas

Hi Dmitry!

If you're looking for a fiber solution, we have our DP83869HM available. Please look through the Product page and data sheet to see if this is compatible with your application. It can support RGMII (MAC interface) to 1000Base-X (Fiber).

Please let me know if you have any other questions, or if I misunderstood the question.

Regards,

Alvaro