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TPD4E05U06: Do we have test data on using this device over 6GBPS?

Part Number: TPD4E05U06
Other Parts Discussed in Thread: TPD4E02B04, , TPD1E05U06

Hello,

Would the TPD4E05U06DQAR be able to be used with 8.1GBPS? Do we have any test data to help with this? The datasheet mentions an upper limit of 6GBPS and we have lots of eye diagrams at this data rate. 

Thanks,

John

  • Hi John,

    We don't have any test data for 8.1Gbps with this device. The best way to judge if a device can support a certain signal speed is by looking at the insertion loss graph in the datasheet. The general rule of thumb is to make sure the signal speed you're protecting is around or below the -3dB point on the insertion loss graph to minimally attenuate the signal.

    I typically recommend a device with lower capacitance for a speed of 8Gbps. We have some lower capacitance devices that can support higher speed signals, what are the voltage levels on the line? 

    Regards,

    Sebastian 

  • Thanks! Sounds like they plan to use TPD4E02B04 on the 8.1GHz port and the TPD4E05U06 on the 6GHz port. Please let me know if you have any concerns. 

    John

  • Hi John,

    No concerns with the TPD4E02B04.

    You mentioned 6Gbps previously, is the TPD4E05U06 protecting a 6Ghz signal or 6Gbps signal? Ghz = 1/2 Gbps.

    I would recommend the TPD4E05U06 for protecting a 6Gbps signal however I would not recommend it for a 6Ghz signal. 

    Regards,

    Sebastian 

  • Good catch, let me clarify that. I think GBPS, but totally missed they wrote GHz. 

    Thanks!

    John

  • Hi John,

    If it's 6 Ghz then I wouldn't recommend using the TPD4E05U06. If the lines are 3.6 V you can use the TPD4E02B04. For 5.5 V lines the lowest capacitance diode we'll have is 0.4pF, TPD1E05U06. 6GHz would be right at the -3dB point of the insertion loss graph for this device. 

    Regards,

    Sebastian