MM74HC74AN

Flip Flops Overview

The MM74HC74AN is a dual D-type flip-flop manufactured by Fairchild Semiconductor, utilizing advanced silicon-gate CMOS technology. It features independent data, preset, clear, and clock inputs with complementary Q and Q outputs. The device operates within a wide power supply range of 2V to 6V. Key electrical parameters include a typical propagation delay of 20 ns, a maximum quiescent current of 40 µA for the HC series, and a maximum input current of 1 µA. It provides a fanout capability of 10 LS-TTL loads and is housed in a 14-pin DIP package.

Flip Flops Feature Summary

• Dual positive edge-triggered D flip-flops with independent data, preset, and clear inputs
• Complementary Q and Q outputs for versatile logic applications
• High noise immunity and low power consumption characteristic of CMOS technology
• Capable of driving up to 10 LS-TTL loads while maintaining signal integrity

Flip Flops Applications

• Memory address decoding systems requiring reliable state storage
• Data routing circuits utilizing parallel-to-serial conversion
• Digital logic designs needing precise timing control via clock pulses
• General-purpose sequential logic circuits in consumer electronics

Flip Flops Procurement Notes

Verify the manufacturer marking on the component body to confirm Fairchild Semiconductor origin, as ON Semiconductor also produces this part number. Ensure the package type matches the required DIP-14 configuration for your PCB layout. Check for lead-free compliance markings if environmental regulations apply to your assembly process. Confirm that the specific revision of the datasheet aligns with your design specifications regarding electrical characteristics.

Flip Flops Selection Notes

Select the MM74HC74AN when a dual D-type flip-flop with high-speed operation comparable to LS-TTL is required. Its wide voltage range makes it suitable for mixed-voltage systems. Consider its low quiescent current for power-sensitive applications. The complementary outputs provide flexibility in circuit design without additional inverters. Ensure the operating temperature range meets your environmental requirements.

Flip Flops Part Context

This component belongs to the 74HC family of high-speed CMOS logic devices. It is functionally equivalent to other dual D-flip-flop parts in the standard 74xx series but offers improved speed and lower power consumption. The 'MM' prefix typically denotes military or extended temperature grade variants in some contexts, though standard commercial grades are common. It serves as a fundamental building block for sequential logic in digital systems.

Flip Flops Replacement Considerations

The MM74HC74AN is pin-compatible with other 74HC74 variants from different manufacturers. Verify that substitute parts maintain the same 2V-6V operating range and 20 ns propagation delay. Ensure the replacement device supports the same 10 LS-TTL fanout capability. Check for any differences in input protection schemes or output drive strength if interfacing with sensitive loads.