74AC574SC

Overview

The onsemi 74AC574SC is an octal D-type flip-flop with three-state outputs belonging to the 74AC logic family. It features a single-ended non-inverting input configuration and operates within a supply voltage range of 2 V to 6 V. The device provides high drive capability with output currents of ±24 mA. Key electrical parameters include a propagation delay of 13.5 ns and a maximum clock frequency of 85 MHz. It is housed in a 20-SOIC package and supports surface-mount installation across an operating temperature range of -40°C to +85°C.

Feature Summary

• Octal D-type edge-triggered flip-flop architecture with eight independent data storage elements
• Three-state outputs allowing direct bus connection without external buffers
• High-speed CMOS technology enabling operation up to 85 MHz clock frequencies
• Strong output drive capability supporting loads up to 24 mA

Applications

• Parallel-to-serial data conversion circuits
• Register banks for microprocessor memory interfaces
• Buffering and latching in digital signal processing systems
• General-purpose data storage in industrial control logic

Procurement Notes

Verify the specific suffix against official datasheets to confirm package dimensions and pinout compatibility. Confirm RoHS compliance status through manufacturer documentation as revisions may vary. Ensure ESD handling protocols are followed during assembly due to CMOS sensitivity. Cross-reference lead times and availability directly with authorized distributors rather than relying on third-party inventory counts.

Selection Notes

Select this component when high-speed data latching is required within low-voltage systems. The 74AC series offers faster switching speeds compared to standard HC logic while maintaining compatible pinouts. Consider the ±24 mA drive strength for direct interfacing with heavy loads. Verify that the 2 V to 6 V supply range aligns with the target system power rails before integration.

Part Context

This part belongs to the widely adopted 74AC logic family, known for balancing speed and power consumption. It serves as a fundamental building block for sequential logic design. The octal configuration reduces board space by integrating eight flip-flops into a single package. It complements other 74AC components like decoders and multiplexers in complex digital architectures.

Replacement Considerations

Check for equivalent parts from other manufacturers such as Fairchild or Texas Instruments offering identical pinouts and electrical characteristics. Ensure substitute devices match the 20-SOIC package profile and operate within the same voltage and temperature ranges. Verify that any alternative maintains the three-state output functionality and propagation delay specifications.