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