Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is?

Among the logic families, the family which can be used at very high fr

1.	Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is?
A.	TTLAS
B.	CMOS
C.	ECL
D.	TTLLS
Answer» D. TTLLS