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DS90LV012A: DS90LV012ATMF used as clock buffer.

Part Number: DS90LV012A

Hello,

  I am using DS90LV012ATMF as a clock buffer at 50MHz. I would like to use it to drive a 50R input. Is the driver capable of operating at such load without MTBF degradation? I cannot prove its suitability from the datasheet information, since it does not mention anything regarding drive strength (mentions only sink 100mA).

Best regards,

Lefteris Loghis

  • Hi,
    The DS90LV012 will drive a 50 ohm load to GND without any degradation. The output VOH level will not reach the normal output amplitude due to the increased current demand. To get a better understanding of the output waveform under this loading I would suggest using the IBIS model to run a quick simulation.

    Regards,
    Lee
  • Hello,

    Can you please clarify your question? The DS90LV012A is an LVDS receiver, not a driver. Generally, however, an LVDS driver such as DS90LV011A drives 3.5mA into the 100 ohm termination (load) to produce 350mV across the termination, and if you have a 50 ohm termination, it won't hurt the LVDS driver, however, the voltage across the 50 ohm termination would be 1/2 what it should be (175 mV).

    Regards,
    Yaser
  • In reply to Lee Sledjeski:

    Thank you very much Lee.

  • In reply to Yaser Ibrahim:

    Hello Yaser,

    I wanted to use its CMOS output to drive a 50R load. I was afraid of overloading the CMOS out.

    Regards,
    Lefteris
  • In reply to Lefteris Loghis:

    Hello Lefteris,

    Thanks for the clarification. Please let us know if you need any further assistance.

    Regards,
    Yaser
  • In reply to Yaser Ibrahim:

    hi Yaser,

    thanks a lot...

    do we have any similar part with stronger driver capability?

    if not a single chip, what would be your advice for a cost effective implementation?

    thansk a lot in advance

    KR

    Vincenzo

  • In reply to Vincenzo Pizzolante:

    Hello Vincenzo,

    I think DS90LV012A may be your best bit. I can't find any similar device with higher drive capability. One option is to add a buffer at the output, for example SN64BCT25244 is a high drive buffer, but it has 8 buffers!

    Regards,
    Yaser
  • In reply to Vincenzo Pizzolante:

    Here is a single gate buffer with higher drive than the DS90LV012A output.

    www.ti.com/.../sn74lvc1g34.pdf

    Regards,

    Lee

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