A 5-bit asynchronous binary counter is made up of five flip-flops, each with a 12 ns propagation delay. The total propagation delay (tp(tot)) is ________(a) 12 ms(b) 24 ns(c) 48 ns(d) 60 nsI got this question in an online interview.I need to ask this question from Counter Implementation and Applications topic in section Counters of Digital Circuits

A 5-bit asynchronous binary counter is made up of five flip-flops, eac

1.	A 5-bit asynchronous binary counter is made up of five flip-flops, each with a 12 ns propagation delay. The total propagation delay (tp(tot)) is ________(a) 12 ms(b) 24 ns(c) 48 ns(d) 60 nsI got this question in an online interview.I need to ask this question from Counter Implementation and Applications topic in section Counters of Digital Circuits
Answer» Right option is (d) 60 ns The EXPLANATION is: Since a counter is constructed using flip-flops, therefore, the PROPAGATION delay in the counter occurs only due to the flip-flops. Each BIT has propagation delay = 12ns. So, 5 BITS = 12ns * 5 = 60ns.

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