CD74FCT574SM

Overview

The CD74FCT574SM is an 8-bit D-type flip-flop manufactured by Harris Corporation. It features a positive-edge trigger mechanism and tri-state non-inverted outputs. The device operates within a supply voltage range of 4.75V to 5.25V, with a quiescent current of 8 µA. It supports a clock frequency of 70 MHz and exhibits a maximum propagation delay of 10 ns at 5V with a 50 pF load. The component is housed in a 20-SSOP package.

Feature Summary

• Positive-edge triggered D-type configuration for reliable data capture
• Tri-state non-inverted outputs for flexible bus interfacing
• High-speed operation supporting up to 70 MHz clock frequencies

Applications

• Parallel data storage in digital systems
• Buffering and registration of high-speed data buses
• Timing synchronization circuits requiring precise edge triggering

Procurement Notes

Verify the specific suffix 'SM' corresponds to the 20-SSOP package variant when sourcing. Confirm RoHS compliance status as some sources indicate compliance while others may list older revisions. Ensure the operating temperature range meets system requirements, noting variations between commercial (0°C to 70°C) and industrial grades if applicable. Cross-reference manufacturer documentation for exact pinout and electrical characteristics.

Selection Notes

Select this component for applications requiring 8-bit parallel data latching with high-speed performance. The 70 MHz clock capability suits fast digital interfaces. Consider the 20-SSOP package constraints for PCB layout. Verify that the tri-state output drive strength meets load requirements. Compare against other FCT series devices if different bit widths or inversion options are needed.

Part Context

This part belongs to the Harris FCT (Fast CMOS Technology) series, designed for high-speed logic applications. It complements other bus drivers and transceivers in the same family, such as the CD74FCT540 and CD74FCT828, providing registered storage capabilities rather than simple buffering.

Replacement Considerations

Check for direct equivalents from Fairchild Semiconductor or ON Semiconductor, which acquired Harris Logic assets. Verify pin compatibility and electrical specifications before substitution.