I am using 74hc273 for power switching. The problem I am facing that the output of the 74hc273 drops to zero within half a second while the input remains high, also the MR pin stay high. What are the possible issues?
Can you post a schematic, so we can see what your plans are?
What is the supply voltage of the 74HC273?
It must be between 2 and 6 volts.
What are you switching?
The 74HC273 can only deliver 4 mA.