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SN74LV273A: Are there any rise/fall rate requirement for both CLK and CLR , and VCC?

Part Number: SN74LV273A


     The Q output is occasionally not kept low even after CLR is already set at low during power-up in which the CLK and CLR ramp up speed is very low (rise speed is 3.3v/2s). The detail test waveforms are attached.

there are 2 questions as below.

Questions: ­

  1. Are there any rise/fall rate requirement for both CLK and CLR of SN74LV273?
  2. About the issue listed in test report, is it caused by rise speed of CLK and CLR?