IDT74FCT652TQ

Overview

The IDT74FCT652TQ is an octal bus transceiver and register featuring three-state outputs, manufactured by Integrated Device Technology. It operates within a supply voltage range of 4.75 V to 5.25 V and supports TTL input and output levels. The device provides a propagation delay of 9 ns, with low-level output current capability of 64 mA and high-level output current of -32 mA. It functions as a non-inverting circuit in a 24-pin QSOP package, designed for surface mount installation across an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates eight-bit bus transceiver functionality with internal register storage capabilities
• Provides three-state outputs for effective bus line isolation and control
• Supports TTL-compatible logic levels for broad interface compatibility

Applications

• High-speed data buffering and registration in computer systems
• Clock drivers and buffered receivers in communication equipment
• Memory module address and data bus management

Procurement Notes

Verify the specific manufacturer source, as Texas Instruments also produces the CY74FCT652 variant. Confirm the package type matches the required 24-pin QSOP form factor. Check RoHS compliance status against project requirements. Ensure the component meets the specified -40°C to +85°C industrial temperature rating. Validate that the non-inverting logic polarity aligns with the circuit design specifications.

Selection Notes

Select this component when an octal registered transceiver with three-state outputs is required for system integration. The FCT series offers faster switching speeds compared to standard LS logic families. Consider the 24-pin QSOP package constraints for PCB layout density. Verify power supply stability within the 4.75 V to 5.25 V range to ensure reliable operation under varying load conditions.

Part Context

This part belongs to the FCT (Fast CMOS Transceiver) logic family, which bridges the performance gap between standard TTL and advanced CMOS technologies. The IDT variant shares functional similarities with other octal bus transceivers but is distinguished by its specific packaging and manufacturing origin. It serves as a critical interface component in digital systems requiring high-speed data transfer and signal integrity.

Replacement Considerations

The CY74FCT652TQC from Texas Instruments is a functionally equivalent alternative within the same logic family. Verify pinout compatibility and electrical parameters before substitution. Ensure the replacement part meets the same thermal and voltage specifications.