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SN74ABT16827: Configure this buffer chip as a clock distribution chip

Mohammad Mayyan
Prodigy 10 points
Part Number: SN74ABT16827
Other Parts Discussed in Thread: CDC339,

I have a clock source that can handle up to 15pF load. I need to connect this clock signal to a 100 ADC's to sync them all together.

I started looking for a clock distribution chip that works at 5V. I found this one CDC339 but I need one that has more outputs.

The question now is will this chip SN74ABT16827 work as a clock distribution chip if I connect my clock signal to one input, say 1A1, and connect the output of this buffer 1Y1 to the remaining inputs 1A2 - 2A10 so that I get 19 copies of the clock signal. I know there will be a time delay between the original clock signal and the 19 copies which I assume they will not have a time delay among themselves.

Does a clock distribution chip have a significantly better performance over my configuration using SN74ABT16827, if there is any?

Thanks,

  • 0
    TI__Mastermind 44675 points
    Hi Mohammad,

    Welcome to the forum. Its a buffer/driver so it will have pretty much the same function as the CDC339. I don't support the CDC339 so I can't compare performances, but I can say our buffers are used a lot for clock distribution. You are correct about the time delay from the original to the copies. The copies themselves will have a slight skew of 1 ns or less. If having less skew than that is critical than you may have to use a dedicated clock buffer.