For synchronous series counter of modulus 256, the propagation delay for each flip flop is 25 nsec and propagation delay of each two input AND gate is 5 nsec. What is the maximum frequency of MOD 256 counter ?(in MHz)
a)18.18
b)19.18
c)20.19
d)17.18
I am not getting in a synchronous counter, clock is applied simultaneously therefore maximum time delay should be 25+5 (For flip flop and AND gate) = 30 nsec which makes Frequency = 1/(30 nsec) = 33.33 Mhz?
please correct me where I am going wrong.
Thanks for your help :)