|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.