Difference Between Latch and Flip-flop | Latch vs Flip-flop

By Mohit Uniyal|Updated : September 22nd, 2022

The Difference Between Latch and Flip-flop is that the flip-flop uses an edge-triggered approach, and the latch uses a level-triggered approach. The flip-flop and latch are a type of memory circuit. The output change in both of them varies based on the signal triggered by the circuit.

Flip-flop is nothing but a pair of latches. Flip-Flop is edge-triggered, whereas latch is end-triggered. Check out the sections below to learn more about the difference between latch and flip-flop, along with a brief introduction about the flip-flop and latch.

Table of Content

Difference Between Flip-flop and Latch

The flip-flops and latch carry various differences, from basic principles to working and sensitivity. These differences help us choose a better memory device as per our requirements. 

Difference Between Latch and Flip-flop

We have outlined the difference between flip-flop and latch in the table provided below:

It uses an edge-triggered approach.It is a level-triggered approach.
Flip-flops are classified as synchronous and asynchronous.No such classification of Latch.
Flip-flops have a clock signal.Does not have a clock signal.
Flip-flops are built up from a latch.They are built up from gates.
The operating speed is slow.The operating speed is high.
Flip-flops require power more than a latch.Required less power.
It covers more area.Less area required.

What is Flip-flop?

Flip-flops are used to save memory. Flip-flops are also known as one-bit memory or bistable multivibrators. It stores one bit of memory/information. They are the building blocks. They are the basic digital memory circuit. The flip-flops use the edge-triggered approach. There are four types of flip-flops:

What is a Latch?

A latch is a memory device and is also used to save memory. A latch is used to immediately change the output based on the input applied in electronic devices. Only stores 1 or 0 at a time. There are two inputs in the latch, i.e., SET and RESET. Based on these inputs, two types of outputs are generated. Various types of Latch are:

  • JK Latch
  • T Latch
  • SR Latch
  • Gated D Latch
  • Gated S-R Latch
  • D latch

Latch vs Flip Flop: Conclusion

Let us derive a few conclusions after our discussion:

  • Flip flops are the improved versions of latches. Flip-flops are preferred over latches because of various advantages, such as using a clock signal and an edge-triggered approach.
  • Even though flip-flop covers more area, it is still preferred because it eases the design interpretation.

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FAQs on Difference Between Flip-flop and Latch

  • The major difference between flip-flops and latch is that the basic working principle of both is different. Flip-flops work on the end triggered approach and the latch is based on a level-triggered approach.

  • The flip-flop is usable as the register, whereas the latch cannot be used as a register. The flip-flops carry clock signals which makes them usable as a register.

  • Flip-flop is an electronic device used to save memory. They are a combination of latches. There are a total of four types of flip-flops:

    • JK Flip-Flop
    • SR Flip-Flop
    • Data Flip-Flop
    • Toggle Flip-Flop
  • The flip-flop will check the input and will only change the output based on the controller such as the clock signal whereas the latch will generate the output change as soon as the input varies.

  • The latch is a device used to generate and change output as the input changes. It is an electronic device used to save memory. They are sensitive to the applied input.

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