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SN74LV541A: tpd with small load capacitance

Hung Ching Hsu
Expert 3086 points
Part Number: SN74LV541A

Hi Team, 

Datasheet says tpd is 1~6ns for 5V Vcc and 15pF CL. 

Customer wants to know will tpd be smaller if smaller CL such as 2pF is used?

And Is it possible to estimate tpd value corresponding to CL value? 

Thanks.

Regards,

Jo

  • +1
    TI__Guru* 96947 points

    Hi Jo,

    Propagation delay scales linearly with load capacitance. Assuming the datasheet includes at least two load conditions (which is not always the case), then linear extrapolation can give a very good estimate of delay for different loads.

    As you can see above, the intersection with the imaginary "0 load" condition will indicate the intrinsic delay of the device. In this case, the device will have a minimum of 5.14ns for the maximum propagation delay over temperature.