In one embodiment of the invention, the output circuit is responsive to {HEAD ~ assertion} of {TAIL ~ a control signal} to selectively enter a high impedance state 
of
In one embodiment of the invention , the output circuit is responsive to { HEAD ~ assertion } of { TAIL ~ a control signal } to selectively enter a high impedance state
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH