74VHCT574ASJ

Overview

The Fairchild Semiconductor 74VHCT574ASJ is an octal D-type flip-flop featuring three-state outputs, designed for high-speed digital applications. It operates within a supply voltage range of 2.0V to 5.5V and supports a maximum clock frequency of 133MHz at 5V. The device utilizes VHCT technology to ensure TTL compatibility while maintaining CMOS performance characteristics. Packaged in a 20-pin SOIC format, it provides efficient data storage and transfer capabilities with low power consumption suitable for various logic circuit implementations.

Feature Summary

• Octal D-type flip-flop architecture with eight independent data storage elements
• Three-state output capability allowing direct bus interface connections
• TTL-compatible input thresholds ensuring seamless integration with legacy systems
• High-speed operation supporting clock frequencies up to 133MHz

Applications

• Parallel-to-serial data conversion circuits
• High-speed buffer and register designs
• Memory address latching applications
• Digital signal processing data path control

Procurement Notes

Verify the specific suffix designation against manufacturer documentation to confirm package dimensions and thermal characteristics. Ensure that the ordering information matches the required tape-and-reel or tube packaging configuration. Cross-reference the active status with current production lifecycle notices to avoid obsolescence risks during procurement planning.

Selection Notes

Select this component when TTL input compatibility is required alongside high-speed CMOS performance. The VHCT series offers superior switching speeds compared to standard HCT variants. Consider the 20-SOIC package constraints regarding board space and thermal dissipation requirements for dense PCB layouts.

Part Context

This part belongs to the 74VHCT family, which combines the speed advantages of VHC technology with the input threshold levels of HCT logic. It serves as a bridge between older TTL-based designs and modern high-speed CMOS systems, providing reliable performance in mixed-voltage environments without requiring level shifting components.

Replacement Considerations

Texas Instruments SN74VHCT574PW

FAQ

Is the 74VHCT574ASJ compatible with 5V TTL logic inputs?

Yes, the VHCT technology ensures that the input thresholds are compatible with standard 5V TTL logic levels.

What is the maximum operating frequency for this device?

The device supports a maximum clock frequency of 133MHz when operating at a 5V supply voltage.