D-Latch is a simple clocked memory element in which the output is equal to the stored...

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D-Latch is a simple clocked memory element inwhich the output is equal to the stored state inside theelement.
In D-Latch the state is changed whenever the appropriate inputschange and the clock is asserted. A D-Latch has two inputs and twooutputs.
The inputs are the data value to be stored and a clock signalthat indicates when the latch should read the value on the datainput and store it. The outputs are simply the value of theinternal state and its complement.
When the clock input is asserted, the latch is said to be open,and the value of the output becomes the value of the data input.When the clock input is de-asserted, the latch is said to beclosed, and the value of the output is whatever value was storedthe last time the latch was open.
What is the difference between DFF and D-Latch?
Can one chip be used for constructing the other? Explain.

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3.6 Ratings (684 Votes)

Dlatch Latch is an electronic device that can be used to store one bit of information The D latch is used to capture or latch the logic level which is present on the Data line when the clock input is high If the data on the D line changes state while the clock pulse is high then the output Q follows the input D When the CLK input falls to logic 0 the last state of the D input is trapped and held in the latch D Flip Flop The working of D flip flop is similar to the D latch except that the output of D Flip Flop takes the state of the D input at the moment of a positive edge at the clock pin or negative edge if the clock input is active low and delays it by one clock cycle Thats why it is commonly known as a delay flip flop The D FlipFlop can be interpreted as a delay line or zero order hold The advantage of the D flipflop over the Dtype transparent latch See Answer

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