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CD4512B: Hold time for select pins...

Peter Tseng
Mastermind 6650 points

Part Number: CD4512B

Hi Team,

May I Know how long the selsect pins (A/B/C) need to keep to switch OK?

As customer testing, using the test program will cause the switching fail sometimes, but manual switch will not. 

Please help to check.

Thanks.

  • +1
    TI__Mastermind 18001 points

    Hi Peter,

    The select pins need to be held longer than the maximum "A" Select to Output + Transition time for your voltage, assuming you are using a standard loading condition. If you are driving a slow-to respond load (like a large capacitance), you may need to hold longer.