CD74FCT2652ATQM

Overview

The CD74FCT2652ATQM is a non-inverting bus transceiver from the FCT series, manufactured by Harris Corporation. It features two independent 8-bit functions within a single package, providing bidirectional data transmission capabilities. The device utilizes CMOS technology and operates with a true output polarity. It is housed in a 24-pin QSOP (Quad Small Outline Package) with a width of 3.90mm. The component supports a supply voltage range of 4.5V to 5.5V and includes three-state outputs with series resistors for improved signal integrity.

Feature Summary

• Provides two independent 8-bit bidirectional data paths for flexible system interconnects
• Features non-inverting logic with true output polarity for direct signal routing
• Incorporates three-state outputs with series resistors to minimize reflections and noise

Applications

• Bidirectional data bus interfaces in high-speed digital systems
• Multiplexed data transmission between microprocessors and memory modules
• I/O expansion circuits requiring isolated directional control

Procurement Notes

Verify the specific suffix ATQM confirms the 24-QSOP package variant. Confirm that the manufacturer designation aligns with Harris Corporation or its successor entities, as corporate structures may affect part sourcing. Ensure compatibility with existing board layouts regarding the 24-SSOP/QSOP footprint dimensions. Check for RoHS compliance status if required by local regulations, as older Harris parts may not meet current standards.

Selection Notes

Select this component when dual-channel, non-inverting bus transceivers are required for 8-bit wide data paths. The FCT series offers faster switching speeds compared to standard HCT logic, making it suitable for higher frequency applications. Consider the QSOP package constraints for PCB space limitations. Verify that the 3-state output drive strength meets the load requirements of the connected circuitry without additional buffering.

Part Context

This device belongs to the Harris CD74FCT family of fast CMOS logic devices. The FCT series was designed to bridge the performance gap between standard TTL and advanced CMOS technologies. Similar variants include the CD74FCT162652 series, which offers registered functionality, whereas the 2652 provides unregistered direct transmission. The 2652 model specifically focuses on simple, low-latency bus interfacing without internal storage elements.

Replacement Considerations

Direct substitutes may include other Harris CD74FCT2652 variants with different package suffixes, such as CD74FCT2652M for SOIC packages. Cross-referencing with equivalent logic families from other manufacturers requires verifying pin compatibility and electrical characteristics like propagation delay and output current.