74AC374SJX

Overview

The Fairchild Semiconductor 74AC374SJX is an octal D-type flip-flop featuring three-state outputs, designed for bus-oriented applications. It operates within a voltage range of 2.0V to 6.0V and supports data rates up to 100MHz at 5V. The device utilizes CMOS technology with TTL-compatible inputs, ensuring compatibility with standard logic families. It is housed in a 20-lead SOIC package (JEDEC MS-013) and complies with RoHS standards for lead-free manufacturing.

Feature Summary

• Octal D-type flip-flop architecture with separate inputs for each stage
• Three-state outputs enabling efficient bus-oriented system designs
• Buffered clock and output enable signals common to all flip-flops
• TTL-compatible input levels for broad interface compatibility

Applications

• Bus-oriented memory systems requiring high-speed data latching
• Register files in digital signal processing architectures
• High-speed data acquisition and storage circuits
• Parallel-to-serial conversion interfaces

Procurement Notes

Verify the specific suffix 'SJX' against the manufacturer's current ordering guide to confirm the exact tape-and-reel packaging configuration and moisture sensitivity level. Ensure the component matches the active production status, as older suffixes may indicate obsolete or discontinued variants. Cross-reference the date code and lot number with the distributor's certification documents to guarantee authenticity and traceability for quality assurance purposes.

Selection Notes

Select this component when an octal register with tri-state capability is required for high-speed bus applications. It is suitable for designs needing TTL-compatible inputs while maintaining low power consumption typical of AC series logic. Consider the 20-lead SOIC package constraints for PCB layout. Verify that the operating voltage range aligns with the system's power supply rails and that the 100MHz speed rating meets the timing requirements of the target application.

Part Context

This part belongs to the 74AC family of advanced CMOS logic devices, which offers higher speed and lower power dissipation compared to standard HC series components. The 74AC374 variant specifically provides eight D-type flip-flops with three-state outputs, making it a standard solution for parallel data storage in microprocessor-based systems and communication interfaces.

Replacement Considerations

Compatible substitutes include the SN74AC374 from Texas Instruments and the MM74AC374 from National Semiconductor. These alternatives share identical pinouts, logical functions, and electrical specifications, allowing for direct replacement in existing designs without circuit modification.