Difference Between Combinational and Sequential circuit

Combinational Circuit

1. The output of combinational circuit is dependent on the current input state.
2. It do not have the ability to store data as it has no memory.
3. It does not require any control input feedback. It gives output to the given input as per the logic designed.
4. It is mainly used for Arithmetic and Boolean operations.
5. The elementary building blocks are logic gates.

Sequential Circuit

1. The output of combinational circuit is dependent on the current input state as well as past input.
2. It has the memory that stores present state of circuit which can be used as a control input for next operation.
3. It requires feedback from output to input which is stored in the memory for the next set of operation.
4. It is mainly used for storing data.
5. The elementary building unit are Flip flops.