CD74ACT574EG4

Overview

The CD74ACT574EG4 is an octal D-type flip-flop with three-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and features a propagation delay of 11.2 ns. The device provides high-level output current of -24 mA and low-level output current of 24 mA. It is housed in a PDIP-20 package designed for through-hole mounting. The component supports TTL input levels and offers non-inverting logic polarity.

Feature Summary

• Octal D-type edge-triggered flip-flop architecture with eight independent storage elements
• Three-state outputs allowing direct bus driving connections without external buffers
• TTL-compatible input structure ensuring compatibility with standard logic families
• Non-inverting data path providing straightforward signal transmission from input to output

Applications

• Parallel-to-serial data conversion circuits
• Register file implementations in microprocessor systems
• I/O buffering for peripheral interface modules
• State machine memory elements in digital control logic

Procurement Notes

Verify the specific suffix EG4 indicates RoHS compliance and lead-free manufacturing status as per Texas Instruments documentation. Confirm the PDIP-20 package dimensions match your PCB footprint requirements. Ensure the operating temperature range of -55°C to 125°C aligns with your environmental specifications. Cross-reference the datasheet revision date to ensure all electrical characteristics are current before finalizing procurement.

Selection Notes

Select this component when requiring high-speed octal latching with three-state capability in a through-hole package. The ACT series offers faster switching speeds compared to standard HC or HCT variants while maintaining CMOS power efficiency. Consider the 24 mA drive strength for moderate load applications. Verify that the 4.5 V to 5.5 V supply requirement fits your system power rails before choosing this part over lower voltage alternatives.

Part Context

This part belongs to the SN74ACT574 family of octal D-type flip-flops. It shares functional similarities with other members like SN74ACT574N but differs in packaging and compliance attributes. The EG4 suffix typically denotes environmental compliance and specific tape-and-reel or tube variations depending on the manufacturer's coding scheme. It serves as a high-performance alternative to older ALS or standard AC series devices in modern digital designs.

Replacement Considerations

SN74ACT574N is a pin-compatible alternative in the same logic family. CD74ACT574E is a related variant with similar electrical characteristics. Verify package type and suffix codes carefully as they may indicate differences in RoHS status or shipping quantity rather than functional changes.