{HEAD ~ An IC power protection circuit} functions as a surge protection circuit and {TAIL ~ reverse connection protection circuit} 
functions as
{ HEAD ~ An IC power protection circuit } functions as a surge protection circuit and { TAIL ~ reverse connection protection circuit }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL