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SN74LVC1G74: RC circuit at CLR pin

Part Number: SN74LVC1G74
Other Parts Discussed in Thread: SN74HCS74

Hi team,

   on data sheet Figure 5, there is a RC delay circuit at CLR pin diagram. Is there any constraint for RC circuit design? If RC delay time is longer or short, does it impact IC reset function? or I need care of reset threshold voltage only? 

    

Design target: output Q is able to change state from “low” to “high” once a reset signal (Low -> high) from system

  1. When power on, no signal, action 1, Q=Low is target.

So a RC circuit is used to delay CLR pin from Low state then change to high state

  1. Once 3.3V is ready, then PRE= CLR =D = High, then CLK has rising edge to make output Q change to “high” from “Low”