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SN74LVC1G74: power on initial state of Q

Part Number: SN74LVC1G74

Hi Sir,

My customer use SN74LVC1G74 and would like to know if it have a fixed initial state?

We did not use CLR/PRE on the circuit.

We are facing a issue that each time the power on stats is different on Qout, please see below waveform.

Thanks,

Patrick

  • Hi Patrick,

    The output of a Flip-Flop is inherently unknown due to the structure of the device.

    You can use the PRE or CLR pins to force an initial condition like this: