MC74AC74N

Flip Flops Overview

The MC74AC74N is a dual D-type positive-edge triggered flip-flop manufactured by onsemi, belonging to the 74AC logic series. It operates within a supply voltage range of 2V to 6V and features asynchronous preset and clear inputs with complementary outputs (Q and Q̅). The device utilizes silicon gate CMOS technology for high-speed operation and low power consumption. Key electrical parameters include a maximum propagation delay of 10ns at 5V with 50pF load, output source/sink current of 24mA, and static current of 4µA. It supports a clock frequency up to 160MHz and functions reliably across an operating temperature range of -40°C to +85°C.

Flip Flops Feature Summary

• Dual D-type configuration with positive-edge triggering mechanism
• Asynchronous preset and clear inputs independent of clock signal
• Complementary outputs providing both true and inverted signals
• High noise immunity and low power consumption characteristics

Flip Flops Applications

• Data storage and register applications in digital systems
• Shift registers and counters in sequential logic circuits
• Interface between microprocessors and peripheral devices
• Timing control and synchronization in communication protocols

Flip Flops Procurement Notes

Verify that the specific part number suffix matches the required package type, as the 'N' suffix indicates a PDIP-16 through-hole package. Confirm RoHS compliance status, as older production runs may differ from current specifications. Ensure the supplier provides official datasheets to validate pinout and electrical characteristics against the manufacturer's standard documentation before integration into designs.

Flip Flops Selection Notes

Select this component when a dual D-type flip-flop with through-hole packaging is required for prototyping or legacy system maintenance. Consider the 74AC series for its balance of speed and power compared to standard 74LS logic. Verify that the input voltage levels are compatible with the driving circuitry, especially if interfacing with TTL-level signals where the ACT variant might be more appropriate due to specific input threshold requirements.

Flip Flops Part Context

This component is part of the widely adopted 74AC family of high-speed CMOS logic devices produced by onsemi. The 74AC series offers performance improvements over earlier generations while maintaining compatibility with standard logic interfaces. The MC74AC74 specifically addresses the need for basic memory elements in complex digital designs, serving as a fundamental building block for state machines and data path control logic in various electronic applications.

Flip Flops Replacement Considerations

Public confirmed substitute part numbers include SN74AC74N from Texas Instruments and CD74AC74E from Texas Instruments. These alternatives offer functional equivalence and similar electrical characteristics. Verify pinout compatibility and ensure that any replacement maintains the required operating voltage and temperature ranges for the specific application environment.