A MOD-8 counter, also known as a modulo-8 counter, is a type of digital counter that counts from 0 to 7 and then resets to 0 on the next clock pulse. This type of counter is also known as a 3-bit binary counter because it requires three flip-flops to represent the count in binary form (since 23=82^3 = 823=8).

Key Characteristics of a MOD-8 Counter:

1. Number of States: It has 8 states (000 to 111 in binary).
2. Flip-Flops Required: 3 flip-flops are needed.
3. Count Sequence: The count sequence is 0, 1, 2, 3, 4, 5, 6, 7, and then back to 0.
4. Clock Pulses: It advances one count on each clock pulse.
5. Type of Counter: It can be implemented as an asynchronous (ripple) counter or a synchronous counter.