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SN74ALVC04 hex inverter crosstalk possibility

Kevin Hughes
Intellectual 300 points
Other Parts Discussed in Thread: SN74ALVC04

Hello,

I am considering using the SN74ALVC04 hex inverter as part of a discrete non-overlapping clock generator for a high speed Class D amplifier (10-20MHz).  The original layout used discrete inverter ICs with independent bypass capacitors.  If we instead use all the inverters in one package, is there any concern about driving them all at high speed with slight phase offsets between them and only one bypass capacitor?

I appreciate any advice you can lend.

Thanks,

Kevin

  • 0
    TI__Guru 59840 points
    Hi Kevin ,

    You can use the device as long as you are within the recommended operating conditions as per the datasheet .
    Are the bypass caps you mentioned for the Vcc ? If yes, then you can definitely use single bypass caps as there is single device. If there is still a concern for the ripple on the rails , you can use different bypass cap on it. Do you plan to short all the output together ?
  • 0 in reply to ShreyasRao
    Intellectual 300 points
    Hello Shreyas,
    Thank you for the reply. I am considering running all inputs and outputs independently, and am concerned about crosstalk among the channels, particularly internal to the chip and coupling among channels through the VCC line in the chip. Anything to be concerned about there?

    Thanks!
  • 0 in reply to Kevin Hughes
    Guru 299300 points
    When looking at the analog signal levels, there will always be a little bit of crosstalk.

    However, as long as all the inputs stay inside the recommended levels, all outputs are guaranteed to be inside the specifications, i.e., the digital levels will be correct.