a clock input line coupled to {HEAD ~ said serial clock terminal} and to {TAIL ~ said first output pin} 
a clock input line coupled to { HEAD ~ said serial clock terminal } and to { TAIL ~ said first output pin }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL