7. What are tri-state devices and why they are
essential in a bus oriented system?
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Answer Posted / prasad
Tri state buffer is nothing but three state buffer . Two states are equivalent which is logic 0 or 1 . Third state is high impedance state . It behaves like open circuit. Third state is nothing but control input ,when control input is high (1) whatever we are giving input same we are getting as output . When control input is low(0) .the output goes to high impedance state (either 0 or 1) .
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