A macro cell describes an arrangement of cells that may be incorporated into an integrated circuit design and that may include {HEAD ~ a set} of {TAIL ~ clocked devices} and a clock tree subtree for delivering a clock signal to the sinks 
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A macro cell describes an arrangement of cells that may be incorporated into an integrated circuit design and that may include { HEAD ~ a set } of { TAIL ~ clocked devices } and a clock tree subtree for delivering a clock signal to the sinks
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH