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how to put pin in high impedance state ???
whenever the circuit in action :
1st stage : 74hc541(1) well be output and well address M27256 , the 74hc541(2) well be in z-state .
2nd stage : 74hc541(2) well be output and well address M27256 , the 74hc541(1) well be in z-state .
for...
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