SN74HC74N

Flip Flops Overview

The SN74HC74N is a dual D-type positive-edge-triggered flip-flop from Texas Instruments, housed in a 14-pin PDIP package. It features active-low clear and preset inputs for direct control of output states. The device operates within a wide voltage range of 2 V to 6 V and supports temperatures from -40°C to +85°C. Key electrical parameters include a typical propagation delay of 15 ns and an output drive capability of ±4 mA at 5 V. Inputs are buffered to drive up to 10 LSTTL loads, ensuring compatibility with standard logic families.

Flip Flops Feature Summary

• Dual independent D-type flip-flops with positive-edge clock triggering
• Active-low asynchronous clear and preset inputs for immediate state control
• Buffered inputs compatible with TTL loads
• Wide operating voltage and temperature ranges

Flip Flops Applications

• Data storage and register circuits
• Shift registers
• Timing and synchronization logic
• State machine implementations

Flip Flops Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure the correct package type and tape-and-reel or tube configuration. Confirm that the component meets RoHS compliance requirements if applicable to your assembly process. Cross-reference the datasheet revision date to ensure all electrical characteristics align with current design specifications before finalizing procurement.

Flip Flops Selection Notes

Select this component when a dual D-type flip-flop with active-low clear and preset functions is required. It is suitable for designs needing a wide supply voltage range between 2 V and 6 V. Consider the 15 ns typical propagation delay and ±4 mA output drive for speed and load requirements. Ensure the 14-pin PDIP package fits the board layout constraints.

Flip Flops Part Context

This part belongs to the SN74HC series of high-speed CMOS logic devices. It provides dual flip-flop functionality in a single package, offering a compact solution for sequential logic applications. The HC series is known for low power consumption and wide voltage operation, making it versatile for various digital systems.

Flip Flops Replacement Considerations

SN74HCT74N: Compatible alternative with TTL-compatible input thresholds.

Flip Flops FAQ

What is the function of the clear and preset inputs?

The clear and preset inputs are active-low asynchronous controls. Asserting clear forces the Q output low, while asserting preset forces the Q output high, regardless of the clock or data inputs.

How many LSTTL loads can the outputs drive?

The outputs are designed to drive up to 10 LSTTL loads, ensuring robust signal integrity when interfacing with other logic families.