The decoder/driver unit is constituted by {TAIL ~ a P channel MOS transistor}, an N channel MOS transistor, and {HEAD ~ an NAND circuit} 
The decoder / driver unit is constituted by { TAIL ~ a P channel MOS transistor } , an N channel MOS transistor , and { HEAD ~ an NAND circuit }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD