Constructing a D-type flip-flop: “A D flip-flop is built by connecting an inverter between the Set and Clock terminals.” Evaluate the accuracy of this statement.

Introduction / Context:
Understanding how flip-flops are constructed from latches (and from logic gates) helps with conversions between SR, JK, T, and D types. This item checks a common misconception about D flip-flop internals.

Given Data / Assumptions:

• We consider a standard D-type flip-flop (edge-triggered).
• Claim proposes an inverter between Set and Clock pins.
• Standard gate-level constructions apply.

Concept / Approach:
A D flip-flop captures the data present at D on a clock edge and presents it at Q. A common construction is a gated SR latch where S receives D and R receives the complement of D (via an inverter), with proper gating to ensure only one of S or R is asserted at a time during the sampling window. The clock interacts with gating logic, not directly by inverting Set with Clock. Therefore, “inverter between Set and Clock” is not the defining construction.

Step-by-Step Solution:

Verification / Alternative check:
Datasheet logic diagrams for 74HC74/74LS74 show the D path and its inversion feeding internal set/reset gating, not a direct Set–Clock inversion connection.

Why Other Options Are Wrong:
Correct: Misstates the structure.

Valid only for dynamic D latches / JK-to-D conversion: Conversions still rely on routing D and not-D appropriately; the proposed Set–Clock inverter is not a canonical method.

Common Pitfalls:
Confusing asynchronous SET/RESET pins with the synchronous data path; mixing latch gating with SR control signals.

Final Answer:
Incorrect