CD74FCT374TM

Overview

The CD74FCT374TM is an octal D-type flip-flop manufactured by Harris Corporation, belonging to the FCT logic series. It features true outputs with three-state capability and operates within a supply voltage range of 4.5V to 5.5V. The device utilizes CMOS technology and is housed in a 20-pin plastic small outline package (SOP). Key electrical parameters include a propagation delay of 5.2 ns at nominal supply, a load capacitance of 50 pF, and maximum output currents of 64 mA (low) and 32 mA (high). It supports a wide operating temperature range from -40°C to 85°C.

Feature Summary

• Octal D-type flip-flop configuration with independent clock and enable controls for each bit
• Three-state outputs with series resistors to minimize signal reflections and overshoot
• Bus hold input circuitry eliminates the need for external pull-up resistors on unused inputs
• Compatible with TTL input levels while maintaining CMOS low power consumption

Applications

• High-speed data latching in microprocessor-based systems
• Register files in digital signal processing applications
• Interface buffering between different logic families
• Memory address storage in embedded controllers

Procurement Notes

Verify the manufacturer source carefully, as Harris Semiconductor assets were acquired by Renesas Electronics. Ensure the part number matches the specific suffix 'TM' for the SOP-20 package variant. Confirm RoHS compliance status if required for modern assembly processes, as original Harris parts may not meet current environmental standards. Cross-reference datasheets from both Harris and Renesas archives to ensure parameter consistency.

Selection Notes

Select this component when an octal register with high-speed performance and bus hold functionality is required. The FCT series offers faster switching speeds compared to standard 74HC or 74HCT logic families. Consider the three-state output feature for multiplexed bus architectures. Verify that the 5V supply voltage aligns with the system design requirements before implementation.

Part Context

The CD74FCT374TM is part of the broader FCT (Fast CMOS Technology) family developed by Harris Semiconductor. This family was designed to bridge the speed gap between TTL and CMOS technologies. Similar devices in the series include the CD74FCT373 transparent latch and the CD74FCT541 bus driver. The product line represents a significant evolution in high-speed logic design during the late 20th century.

Replacement Considerations

Renesas Electronics acquired Harris Semiconductor's logic business. Check for Renesas equivalents such as the HD74FCT374 series. Texas Instruments also offers compatible parts like the CY74FCT374TSOC, though package and pinout compatibility must be verified. Always consult the latest manufacturer datasheets for any pinout or electrical specification changes.