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LMK00304: reference clock input high/low threshold

Ann_Lien
Genius 14410 points
Part Number: LMK00304

Hello expert,

Do we have the spec like other vendor as below? We only found the spec in datasheet like below. We would like to know the value for input high/low threshold for both maximum and minimum. Thanks a lot!

  • 0
    TI__Genius 10985 points

    Hello Ann_Lien,

    From this excerpt from the data sheet, I believe the V_IL min should be 175mV and V_IH min should be 325mV, assuming you are DC coupling and operating at minimum V_CM. However, I am going to double check with my team first.

    I obtained those values from looking at the V_OCM and V_ID values from the electrical characteristics table, as shown below.

    Best,

    Andrea

  • 0 in reply to Andrea Vallenilla
    TI__Genius 14410 points

    Hello Andrea,

    Thanks for reply but do you mean that the differeital input low spec is 0.25V and differetial high voltage spec is VCC-1.2V for VID=150mV? And may we know what should be the difference between VID=150mV/350mV/500mV? Is it related to different output type? Thanks a lot!

    For example, could you mention which is the differential input high/low as below picture? Thanks a lot!

    Best regards,

    Ann Lien

  • 0 in reply to Ann_Lien
    TI__Genius 10985 points

    Hello Ann Lien,

    I'm a little confused by your question. I think this diagram from the data sheet (p. 18) will allow us to both understand each other better. If the diagram still doesn't help you understand the waveform and the specs from the data sheet, then please reply with your questions on this thread.

    Hope this helps!

    Good luck,

    Andrea