74VHC574SJX

Overview

The Fairchild Semiconductor 74VHC574SJX is an octal D-type flip-flop featuring three-state outputs, fabricated using advanced high-speed CMOS technology. It operates within a supply voltage range of 2.0 V to 3.6 V and supports data storage on positive clock edges. The device provides non-inverting logic with single-ended inputs and outputs, housed in a 20-pin SOP package. Key electrical characteristics include a propagation delay of 15 ns at 3.3 V and output drive currents of ±12 mA. It functions reliably across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Octal D-type flip-flop architecture with three-state outputs for bus-oriented applications
• Advanced high-speed CMOS fabrication ensuring low power consumption and fast switching speeds
• Wide operating voltage range supporting both 3.3 V and 5 V system interfaces

Applications

• Parallel-to-serial data conversion circuits
• Buffered register stages in digital signal processing systems
• Memory address latching in microcontroller-based designs

Procurement Notes

Verify the manufacturer designation carefully, as Fairchild Semiconductor has undergone corporate restructuring and its logic product lines are now managed under onsemi. Confirm that the specific suffix SJX corresponds to the required SOP-20 surface-mount packaging and reel configuration. Ensure compatibility with current supply chain requirements given potential legacy status changes associated with the original brand entity.

Selection Notes

Select this component when an octal buffer or register with tri-state capability is required for high-speed digital interfacing. The VHC series offers superior speed compared to standard HC logic while maintaining lower power consumption than older AC/ACT families. Consider the 2.0 V to 3.6 V operating range for low-voltage applications, ensuring input levels align with the source driver's output specifications for reliable logic threshold detection.

Part Context

This part belongs to the 74VHC family of advanced high-speed CMOS logic devices. The 74VHC574 specifically implements an octal D-type flip-flop structure, distinguishing it from simpler gate-level components. It serves as a fundamental building block for sequential logic design, providing stable data retention and controlled output states within complex integrated circuit systems requiring multiple parallel data paths.

Replacement Considerations

Equivalent parts include MM74VHC574M and MM74VHC574SJX from onsemi, which maintain identical pinouts and electrical specifications. Cross-reference with other manufacturers' VHC-series octal flip-flops such as those from NXP or STMicroelectronics, ensuring voltage ranges and package dimensions match the existing board layout constraints.