# Sequential logic

Sequential logic is a type of digital logic which uses a memory element, such as a flip-flop or latch, to store state information. This state information is then used to determine the next state of the logic circuit. Sequential logic is used in applications where a digital circuit needs to remember its state from one clock cycle to the next.

A common type of sequential logic is a finite state machine (FSM). A FSM is a digital circuit which can be in one of a finite number of states. The state of the FSM is determined by the inputs to the circuit and the current state of the memory elements. The output of the FSM is a function of the current state.

FSMs are used in a variety of applications, such as digital filters, timers, and counters. They are also used in synchronous digital circuits, where all the flip-flops are clocked by the same clock signal.

##### What is sequential and combinational logic?

Sequential logic is a type of logic circuit whose output depends not only on the current input, but also on the past history of the input. That is, the output of a sequential logic circuit depends on the sequence of inputs over time.

Combinational logic is a type of logic circuit whose output depends only on the current input, and not on any past history of inputs. That is, the output of a combinational logic circuit does not depend on the sequence of inputs over time.

#### What uses sequential logic?

Sequential logic is used in a variety of hardware applications, including:

-memory devices (e.g. SRAM, DRAM, etc.)
-storage devices (e.g. hard drives, SSDs, etc.)
-CPUs and microcontrollers
-DSPs (Digital Signal Processors)
-FPGAs (Field-Programmable Gate Arrays)

Sequential logic is also used in many software applications, including:

-compilers
-operating systems
-database management systems
-data compression algorithms
-encryption algorithms What are the two types of sequential logic? The two types of sequential logic are latches and flip-flops. What is the difference between combinational and sequential logic circuit? Combinational logic circuits are those in which the output of the circuit depends only on the current input values. Sequential logic circuits are those in which the output of the circuit also depends on the past input and output values. Which circuit is sequential? A sequential circuit is a type of digital circuit whose output depends not only on the present input but also on the past history of the input. Sequential circuits are used in applications where data storage and/or retrieval is required.