Question 1

What is the D flip-flop truth table?

Accepted Answer

The D (Data) flip-flop truth table is simple: on the rising edge of the clock, the output Q takes the value of input D. D=0 → Q=0; D=1 → Q=1. The previous state doesn't matter – the output always follows the D input at the clock edge.

Question 2

Why is the D flip-flop called a 'Data' flip-flop?

Accepted Answer

It's called the Data flip-flop because it simply captures and stores the data input (D) when triggered by the clock. It has no set/reset or toggle functions – just straightforward data storage, making it ideal for registers and memory.

Question 3

What is the difference between D flip-flop and D latch?

Accepted Answer

A D latch is level-triggered (transparent when enable is high), while a D flip-flop is edge-triggered (captures data only at the clock edge). Flip-flops are more predictable for synchronous circuits because they only change state at specific moments.

Question 4

Where are D flip-flops used?

Accepted Answer

D flip-flops are used in: shift registers, data storage registers, frequency dividers, synchronization circuits, and anywhere single-bit memory is needed. They're the most commonly used flip-flop in digital design.

D Flip-Flop Truth Table – Data Flip-Flop Calculator

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