CY74FCT652TQC

Overview

The CY74FCT652TQC is an octal bus transceiver and register manufactured by Texas Instruments. It operates within a supply voltage range of 4.75 V to 5.25 V and features three-state outputs. The device includes TTL-compatible inputs and outputs, with a propagation delay of 9 ns. It supports low-level output currents of 64 mA and high-level output currents of -32 mA. The component functions as a non-inverting registered transceiver in a single circuit configuration. It is housed in a QSOP-24 package and operates across a temperature range of -40°C to +85°C.

Feature Summary

• Integrates bus transceiver functionality with data registration capabilities for synchronized signal handling.
• Provides bidirectional data transfer between two buses using three-state output drivers.
• Features TTL-compatible input and output logic levels for broad interface compatibility.

Applications

• High-speed data buffering and registration on system buses
• Bidirectional data transmission between microprocessors and peripheral devices
• Memory interface circuits requiring registered data latching

Procurement Notes

Verify the specific suffix 'QCT' against the requested 'TQC' model number, as these denote different packaging or tape-and-reel specifications. Confirm moisture sensitivity level (MSL) requirements and lead-free status (RoHS compliance) prior to ordering. Ensure the supplier provides official datasheets matching the exact part designation to avoid functional mismatches due to minor variant differences.

Selection Notes

Select this component when both bus driving capability and data registration are required in a single package. The FCT logic family offers faster switching speeds compared to standard CMOS alternatives. Consider the QSOP-24 package constraints for PCB layout. Verify that the 9 ns propagation delay meets the timing requirements of the target application bus architecture.

Part Context

This device belongs to the Texas Instruments 74FCT logic family, which utilizes Fast CMOS technology. The 74FCT652 specifically combines the functions of an octal buffer/transceiver with D-type flip-flops. This integration reduces component count in designs requiring both signal direction control and data storage at bus interfaces.

Replacement Considerations

Check for direct substitutes such as the CY74FCT652CTSOCTG4, which shares the registered bus transceiver function but may differ in package type (SOIC vs QSOP). Verify pinout compatibility before swapping packages. Other FCT series parts like the 74FCT574 offer similar registration but lack the bidirectional transceiver feature.