I am using the Novatel OEM729 board for a project, and I need to implement Ethernet in the project.
According to the Novatel OEM7 manual, page 48, the OEM729 does not have Ethernet magnetics, so I have to design my own. According to them, The OEM7 uses the Texas Instruments TKL106 Ethernet PHY. Follow Texas Instruments’ recommendations for transformer selection.
Unfortunately, the TKL106 datasheet contains only a partial list of transformers (only 2), and both of them obsolete. I went back to the OEM7 manual and found the following table, describing the Ethernet transformer characteristics:
So now that I know how these characteristics, how can I find a suitable transformer? I thought that I could use Mouser's filters, for example, but I couldn't find filters that match the parameters in the table.
Please note I cannot use a RJ45 connector.
Looking at the TLK106 datasheet, I found this schematic:
What I don't really understand is the pack of resistors and capacitors on the left. It is said to place them as close to the device, which I assume is the TLK106? But, since that TLK106 is on the Novatel OEM729 board, what can I do? place them as close as possible to the connector (which connects to the Novatel board with a harness) or solder them directly to the wires (on the harness between my board to the Novatel board) so that it would be closer?