TPD4E02B04: FPGA LVDS protection

Part Number: TPD4E02B04
Other Parts Discussed in Thread: DS90LV004, , ESD204

System: in an industrial setting, older series FPGA (400-600Mbps) => 8 LVDS outputs => .3-1m flex cable => target device.

I have control over the fpga and drivers.  I currently have the fpga directly driving the wires, and i know that it can be done directly as there is a demo board that does this, but in the system we would like to at least have the option to protect the fpga as we've seen damage in the past on similar setups.

I see parts such as ESD204 or TPD4E02B04 seem to target this sort of application, but for significantly more $ i could buffer the signal using a device such as DS90LV004 or DS15BR400TSQ/NOPB

1) I'd like to know how robust the ESD solution is vs the buffer

Space is a concern, we may be able to fit TQFP, but given the choice, the WQFN is preferable

2) for both solutions, what are the recommended solutions for this application (taking into account performance, but also looking at the future as we'll probably have to support and build this board for 10-20 years.  it seems for either of these solutions there are so many similar parts made by TI.  any with footprint compatible parts is helpful.

  • Sorry, the ESD devices I mentioned aren't targeting LVDS, so they wont work well, but I was wondering if there was something like it for LVDS.

  • Hello, 

    1. The buffer only provides basic assembly-level ESD protection of 2kV HBM. It leaves them vulnerable to external strikes if used alone, but with an external ESD solution, it can provide high level system protection against IEC 61000-4-2 strikes which are 8kV contact and 15kV air. We also have diode options that preserves signal integrity with ultra low capacitance. For specific pricing, I would recommend reaching out to pd_mkt@list.ti.com. 

    2. Diode wise for DS90LV004  I'm not sure we have a solution with a low enough clamping voltage. The TPD4E02B04 could work, but you would need to test and see as this has a higher clamping voltage. We have deep snapback releasing next year, but for now this would be the only solution, and it would not even be a guarantee .