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TLK2501EVM: TLK2501EVM

Galit Caspi
Prodigy 10 points
Part Number: TLK2501EVM
Other Parts Discussed in Thread: TLK2501

Tool/software:

Hi

I'm using the TLK2501 EVB and facing instability on the RX side.

My question is about the GTX_CLK.

Can I use 100MHz sine clock as the GTX_CLK input?

If the answer is yes, any special characteristic for that clock?

Thanks

Galit

  • 0
    TI__Mastermind 36003 points

    Hi Galit,

    We're looking into this and will get back to you this week.

    Thanks,

    Drew

  • 0 in reply to Drew Miller1
    TI__Mastermind 36003 points

    Hi Galit,

    There are a few things to consider for GTX_CLK.

    • Rise/fall time: For 100 MHz sine clock, it looks like the rise/fall time for 2.5Vpp sine wave from 0.8V to 2.0V is about 1.6ns.  This is a bit higher than the nominal value referenced in the data sheet (1ns), but since there is not min/max, this should be alright.
    • Setup / Hold time: Using a sine clock, I believe you may have less margin for the setup and hold time compared to using a square clock.  This may also introduce challenges if your VIH/VIL levels of your transmitting device are different from those of the TLK2501.
    • Jitter

    In general, we believe it should be possible to use a sine clock, but we would recommend performing some evaluation to ensure you can meet the specifications recommended in the data sheet.

    Thanks,

    Drew