The signals on {HEAD ~ the two wires} from {TAIL ~ the integrated circuit} are processed by a shift/latch control circuit that is external to the integrated circuit 
from
The signals on { HEAD ~ the two wires } from { TAIL ~ the integrated circuit } are processed by a shift / latch control circuit that is external to the integrated circuit
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH