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SN74LVC1G74: SN74LVC1G174 When Data is H and MR is H and clock is falling edge after Master reset Output is getting High

Part Number: SN74LVC1G74

Tool/software:

I'm using the SN74LVC1G74 D-type flip-flop IC. The issue I'm facing is that the output Q is not behaving as expected. Specifically:

  • When the Clock is high and MR (Master Reset) is clear (high), the output Q is low
  • But after clearing MR (setting it low), if I bring the Clock low (falling edge), the output Q goes high again, which is unexpected. I expect it to go low.

Here are the steps I followed:

Data MR Clock Output (Q)
H H Low Low
H H Rising edge High
H L High Low
H H High Low
H H Falling edge High X (Expected: Low)