S.No. | Asynchronous Counter | Synchronous Counter |
1. | All flip-flops are not clocked simultaneously. | All flip-flops are clocked simultaneously. |
2. | Output of first flip-flop drives the clock of the second flip-flop, the output of second drives the third and so on. | there is no interconnection between an output of one flip-flop and clock of next flip-flop. |
3. | The settling time of asynchronous counter is cumulative sum of individual flip-flops. | The settling time of synchronous counter is equal to the highest settling time of all flip-flops. |
4. | It is also known as a serial counter. | It is also known as a parallel counter. |
5. | Its design and implementation are very simple. | Its design and implementation become tedious and complex as the number of states increases. |
6. | It is slow in speed as compared to synchronous counter. | It is faster in speed as compared to asynchronous counter. |
Hence these are the basic differences between the asynchronous counter and synchronous counter.