SN74HC74D

Flip Flops Overview

The SN74HC74D is a dual D-type flip-flop integrated circuit manufactured by Texas Instruments. It belongs to the SN74HC logic family, utilizing CMOS technology for low power consumption and high noise immunity. The device features two independent D-type flip-flops, each capable of positive-edge triggering. It includes dedicated Set (preset) and Reset (clear) inputs that are active-low, allowing asynchronous control of the output state independent of the clock signal. The component is housed in a 14-pin SOIC package, suitable for surface-mount assembly.

Flip Flops Feature Summary

• Dual D-type flip-flop architecture with positive-edge clock triggering
• Asynchronous active-low Set and Reset inputs for direct state control
• Complementary outputs providing both true and inverted logic states
• High-impedance CMOS input structure ensuring low static power dissipation

Flip Flops Applications

• Parallel data storage and buffering in digital systems
• Frequency division and counting circuits
• Shift register construction for serial-to-parallel conversion
• State machine implementation in embedded controllers

Flip Flops Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and tape/reel specifications. Ensure the selected variant matches the required operating temperature range and voltage supply levels for the target application environment. Cross-reference the datasheet revision history to confirm compatibility with existing design parameters.

Flip Flops Selection Notes

Select this component when a dual D-type flip-flop with asynchronous preset and clear functions is required within a standard 5V logic system. Consider the SN74HC series for general-purpose applications requiring moderate speed and low power. Evaluate the SOIC-14 package dimensions against available PCB real estate and thermal constraints before finalizing the design.

Flip Flops Part Context

This part is a member of the Texas Instruments SN74HC family, which offers wide operating voltage ranges and fast switching speeds compared to older TTL equivalents. The 'D' suffix typically denotes the SOIC-14 surface-mount package. It serves as a fundamental building block for sequential logic designs, providing reliable data retention and transfer capabilities in microprocessor-based systems.

Flip Flops Replacement Considerations

Compatible substitutes include the SN74HC74N (PDIP package) for through-hole applications or other manufacturers' equivalent HC-series dual D-flip-flops such as those from ON Semiconductor or NXP, provided pinout and electrical characteristics match.