Hello fellows, I hope you all are doing great. In today’s tutorial, we will have a look at Difference Between Latch and Flip Flop. The latches and flip-flops are called basic elements of electronic networks. latch varies its output according to a given input signal when it is enabled. While in flip flop the output varies according to the conjunction input with the clock signal. In simple words, the clock signal is working as a control signal to show the output according to variations in the input.
As we know memory chips, logic circuits, and microprocessors are digital ICs that store and send information in the shape of bits. So these are called basic building blocks of electronic networks. Due to this latch and flip flop are known as derived series circuitry which works for the storage of information. In today’s post, we will have a detailed look at both latch and flip flops and compare them to find their differences. So let’s get started with the Difference Between Latch and Flip Flop.
Difference Between Latch and Flip Flop
Latch
- Its working principle depends on the level triggering.
- It is constructed with logic gates.
- Its working depends on the applied inputs, applying input, and given output value in binary numbers.
- When it is enabled show sensitivity for an applied signal.
- There is less power required to operate it.
- Its operating speed is high.
- The most common types of Latches are S-R, J-K, T and D.
- It can not be used as a register.
- It needs less place for operation.
- there is no need of a clock signal for its operation.
- Its circuit analysis is complicated.
- Its robustness is low.
Flip Flop
- Its working operation depends on the edge-triggering technique.
- It is constructed with clocks.
- It can not be used as register.
- It circuit analysis is easy.
- Its operation depends on the applying input, applying inputs, and obtained analog output with the pulses of the clock.
- It needs a large operating area.
- It required a clock signal.
- It required large power for operation than a latch.
- Its operation speed is low.
- It performed synchronous operations.
- The types of flip flops are S-R, J-K, T and D.
Types of Flip Flops
- S-R Flip Flop
- J-K Flip Flop
- T Flip Flop
- D Flip Flop
What is Latch
- The latches are series logic circuitry which is constructed with the use of logic gates and used for storage of information in the form of binary numbers.
- This module is level-triggered so functions only when it is enabled.
- It also called a bistable multi-vibrator since it has 2 stable states.
- Its operation is that when enabling pin out is active then variation in the input, and output vary.
- In simple word the variation in input stored data also varied.
- In the below figure, you can see the S-R latch logic circuit.
- In this configuration when enable signal is on the variation in input changes the stored binary information. Due to this, it is known as level sensitive.
What is Flip Flop
- Flip flops are known as series logic circuitry since their current output depends on the applied input, applying input, and obtained output.
- But contrary to the latch most important role of in the operation of flip-flop is a clock.
- Therefore, for flip-flops when input varies from one level to another then the stored bits vary only when the clock is changed from one level to another.
- In the below figure you can see the S-R flip flop.
- So in simple words, flip-flop varies the output with respect to input but with the change in the clock signal.
- Therefore clock signal is the control signal in this case and therefore the output of flip flop take some time.
SR flip flop vs JK flip-flop
- JK flip flop if both inputs are HIGH and output toggles, it changes from high to low and low to high periodically. If both inputs are 1 for SR flip flop both inputs are high then will face an invalid condition, that does not exist for JK flip flop
Latch vs Flip-Flop
- The difference between the latch and the flip flop is that the latch is level triggered and the flip flop is edge triggered
Flip-Flop
- It has 2 stable states 0 and 1.
- It is an edge-triggered level-triggered
- It checks input but varies output according to the clock signal.
- Different gates like NOR, NOT, AND, and NAND are in flip-flops.
- The clock signal it has
- It makes the building blocks of sequential circuits like counters.
- asynchronous or synchronous flipflop types it has.
- A flip-flop can made with Latches
- example D Flip-flop, JK Flip-flop
Latch
- It is also bistable 0 and 1.
- It checks input continuously and works according to the input device
- It is also made with gates.
- It is used to make sequential circuits but is not used.
- Latches do not have a clock signal
- Made with gates
- examples are:SR Latch, D Latch
- The basic difference between a flip flop and a latch is flip flop is edge triggered of the memory circuit and a latch is level triggered type.
- A buffer latch is a level level-sensitive device that can retain and reflect variations in input data also in enable the signal to be active. While flip-flop circuits are triggered with clock signals, latches work asynchronously which means stored data can change at any time irrespective of clock signal.
- The static random access memory is a random access memory that uses a latching circuit for storing each bit. SRAM is volatile memory, data is lost when power is removed
That is a detailed post about the Difference Between a Latch and Flip Flop if you have any questions ask in the comments. Thanks for reading.
