14 TPD = 76 PS, 72 PS, 67 PS, 70 PS FOR THE XL, X1, X2, AND X4 NAND2...

4.14 t

= 76 ps, 72 ps, 67 ps, 70 ps for the XL, X1, X2, and X4 NAND2 gates, respec-

tively. The XL gate has slightly higher parasitic delay because the wiring capaci-

tance is a greater fraction of the total. It also has a slightly higher logical effort,

possibly because stray wire capacitance is counted in the input capacitance and forms

a greater fraction of the total C

.