A decade counter requires

Decade Counter:

• A decade counter is also known as a Modulo-10 Counter as it has 10 states.
• It requires 4 flip-flops to construct a decade counter.

Additional Information

If the input to a mod-n counter is frequency “f”, then output frequency is: “f / n”

For an ‘n’ flip flop counter,

• The total number of states = 2n (0 to 2n – 1)
• The largest number that can be stored in the counter = 2n – 1

To construct any mod counter, the minimum number flip flops required such that: Modulus ≤ 2n

Where n is the number of counters.