CD74FCT652CTM

Overview

The CD74FCT652CTM is an octal registered bus transceiver from the FCT series, manufactured by Harris Corporation. It features two bidirectional data ports with independent direction control and a select input for multiplexed transmission of registered or real-time data. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports TTL input and output levels. It provides three-state outputs with a load capacitance of 50 pF and functions reliably across an operating temperature range of -40 °C to 85 °C.

Feature Summary

• Supports multiplexed transmission of registered or real-time data via a dedicated select input
• Provides independent direction control for bidirectional data flow between two ports
• Features three-state outputs compatible with TTL logic levels

Applications

• Multiplexed data transmission systems
• Bidirectional bus architectures requiring registered buffering
• High-speed digital signal routing in industrial environments

Procurement Notes

Verify the manufacturer designation as Harris Corporation, noting that Texas Instruments acquired the FCT product line. Confirm the package type is PDSO24 (SOP-24) and check for RoHS compliance status, as older Harris versions may not meet current environmental standards. Ensure the specific suffix matches the required lead time and quality grade.

Selection Notes

Select this component when designing systems requiring octal width data transfer with internal registration capabilities. The independent direction control allows flexible bus management without external logic. Consider the 50 pF load capacitance for trace length limitations and ensure the 4.5 V to 5.5 V supply range aligns with the system power architecture.

Part Context

This part belongs to the CD74FCT652 family of registered bus transceivers. It shares functional similarities with other FCT devices but is distinguished by its octal configuration and dual-port design. The Harris Corporation branding indicates pre-acquisition manufacturing, which may affect long-term availability compared to current TI-produced equivalents.

Replacement Considerations

Texas Instruments CY74FCT652 variants serve as direct functional replacements. Verify pin compatibility and electrical specifications, particularly regarding propagation delay and output drive strength, before substituting.