onsemi

MC74ACT74D

MC74ACT74D Description

The MC74ACT74D from onsemi is a high-performance, dual D-type flip-flop integrated circuit designed for precision digital logic applications. Housed in a 14-pin SOIC package, this device operates within a 4.5V to 5.5V supply range, making it compatible with standard 5V TTL/CMOS systems. With a clock frequency of 210 MHz and a max propagation delay of 11ns @ 5V, 50pF, it delivers fast, reliable signal processing. The complementary outputs and positive-edge triggering ensure synchronized data handling, while its set (preset) and reset functionality provides flexible control over output states.

MC74ACT74D Features

• High-Speed Operation: Supports clock frequencies up to 210 MHz, ideal for high-frequency digital systems.
• Low Power Consumption: Quiescent current (Iq) of just 4 µA minimizes energy usage in standby modes.
• Robust Output Drive: 24mA sink/source current ensures strong signal integrity even under heavy loads.
• Wide Voltage Compatibility: Operates at 4.5V–5.5V, seamlessly interfacing with TTL and CMOS logic families.
• Dual Flip-Flop Design: Integrates two independent 1-bit flip-flops in a compact SOIC package, saving board space.
• Low Input Capacitance: 4.5 pF reduces signal distortion and improves high-frequency performance.
• Surface-Mount Ready: MSL 1 (Unlimited) rating ensures ease of handling and assembly in automated processes.

MC74ACT74D Applications

• Clock Synchronization: Perfect for frequency dividers, shift registers, and data storage in timing-critical systems.
• Digital Control Systems: Used in microcontroller interfaces, state machines, and logic buffers for reliable signal conditioning.
• Communication Hardware: Enhances data latching and signal routing in serial/parallel converters and transceivers.
• Industrial Automation: Suitable for PLC I/O modules and motor control circuits due to its noise immunity and fast response.
• Legacy System Upgrades: Replaces older 74-series flip-flops with improved speed and power efficiency.

Conclusion of MC74ACT74D

The MC74ACT74D stands out as a versatile, high-speed flip-flop solution for 5V digital designs, combining low power consumption, strong drive capability, and compact packaging. While marked as obsolete, its performance remains competitive for legacy or niche applications requiring fast edge-triggered logic. Engineers value its dual-element design and TTL/CMOS compatibility, making it a pragmatic choice for timing, control, and data processing circuits where reliability and speed are paramount.