The MC74ACT74DR2G: A Robust Foundation for Digital Logic Systems

The MC74ACT74DR2G from onsemi is a high-performance, dual D-type positive-edge-triggered flip-flop that stands as a fundamental building block in countless digital designs. This integrated circuit incorporates two independent flip-flops, each featuring asynchronous Set (SD) and Reset (RD) inputs, providing designers with a powerful tool for data synchronization, storage, and transfer.

Each flip-flop within the package captures the state of its D (Data) input at the moment the clock signal (CP) transitions from a LOW to a HIGH level. This positive-edge-triggering mechanism ensures precise timing control, which is critical for synchronizing data flow across different parts of a system. A key feature of this device is its asynchronous inputs. The Set and Reset inputs override both the clock and data inputs, allowing the outputs to be forced to a known state (HIGH or LOW) immediately, regardless of the clock condition. This is indispensable for initializing a system or recovering from error states.

Fabricated with Advanced CMOS (ACT) technology, the MC74ACT74DR2G offers the best of both worlds: the low power consumption of CMOS and the high-speed, robust drive capability often associated with TTL logic. It can source or sink up to 24 mA of output current, enabling it to drive heavy loads such as LEDs or other IC inputs directly. Its TTL-compatible inputs allow for seamless interfacing with a wide range of legacy TTL logic families, making it a versatile choice for system upgrades and new designs alike.

Housed in a space-saving SOIC-14 package, this device is well-suited for modern, high-density PCB designs. Typical applications extend across the digital landscape, including use in shift registers, frequency dividers, control registers, and as essential components in state machines and memory modules.

ICGOODFIND: The onsemi MC74ACT74DR2G is an exceptionally versatile and reliable dual D-type flip-flop. Its combination of high-speed performance, significant output drive capability, and critical asynchronous control features makes it an indispensable component for ensuring data integrity and flexible control in complex digital systems.

Keywords: Dual D-Type Flip-Flop, Positive-Edge-Triggered, Asynchronous Set/Reset, TTL-Compatible, High-Speed CMOS