SN74HC74DB

Flip Flops Overview

The SN74HC74DB is a dual D-type flip-flop with positive-edge triggering, manufactured by Texas Instruments. It operates within a supply voltage range of 2V to 6V and features three-state outputs for bus-driven operation. The device includes dedicated set and reset inputs that are asynchronous and active-low. It is housed in a 14-SSOP package (0.3-inch width) suitable for surface-mount applications. Key electrical parameters include a propagation delay of 25ns at 5V with 50pF load, static current of 2µA, and output drive capability of 5.2mA high/low. Operating temperature spans -40°C to 85°C.

Flip Flops Feature Summary

• Dual D-type flip-flops with positive-edge clock triggering
• Asynchronous active-low set and reset inputs
• Three-state outputs for efficient bus driving
• CMOS technology ensuring low static power consumption

Flip Flops Applications

• Parallel-to-serial data conversion circuits
• Shift register configurations
• General-purpose memory storage elements
• Timing control logic systems

Flip Flops Procurement Notes

Verify the specific ordering suffix matches the required package variant, as 'DB' denotes the SSOP form factor. Confirm RoHS compliance status aligns with project environmental requirements. Ensure the manufacturer source is Texas Instruments or an authorized distributor to guarantee component authenticity and datasheet accuracy. Cross-reference the full part number against official TI databases to avoid confusion with similar logic families.

Flip Flops Selection Notes

Select this component when dual independent D-type storage is required in a compact surface-mount footprint. It is suitable for designs operating between 2V and 6V where low power dissipation is critical. Consider the 25ns propagation delay for timing constraints. Verify that the asynchronous set/reset functionality meets the system's initialization needs without requiring complex clock synchronization logic.

Flip Flops Part Context

This part belongs to the SNx4HC series of high-speed CMOS logic devices. It provides standard logic functions compatible with TTL inputs while maintaining CMOS low-power advantages. The SN74HC74 is a widely used general-purpose flip-flop, often found in digital systems requiring reliable data latching and transfer capabilities across various industrial and consumer electronics applications.

Flip Flops Replacement Considerations

Compatible substitutes include SN74HC74N (PDIP package), SN74HC74DR (SOIC package), and SN74HC74D (TSSOP package). These variants offer identical logical functionality but differ in physical packaging dimensions. Ensure pin compatibility and thermal characteristics match the existing PCB layout before substitution.