Load Capacitance of Tri-State Data bus of many SRAMs connected together

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    Question: What will be the load capacitance of a Tri-State Data bus when more than one SRAM busses are connected together?

     

    Answer:

    Eventhough only one SRAM will be using the data bus at a time, it will see the load capacitance due to all other data busses from idle SRAMs.

    If the pin capaticance of one SRAM's Tri-State Data bus is 15pF and if 5 busses are connected together, then the active driver will see a load of 15 x 5 = 75pF