CD74FCT540CTQM

Overview

The CD74FCT540CTQM is an octal buffer manufactured by Harris Corporation, belonging to the FCT logic series. It features a single functional unit with eight bits per element and provides inverted outputs. The device utilizes CMOS technology and supports three-state output characteristics for effective bus driving applications. It operates within a supply voltage range of 4.5V to 5.5V and is housed in a 20-QSOP surface-mount package. The component is designed for high-speed digital signal processing tasks requiring reliable data transmission.

Feature Summary

• Provides inverted buffering functionality for digital signals
• Supports three-state outputs for efficient bus management
• Utilizes CMOS technology for low power consumption
• Designed for high-speed data transmission applications

Applications

• Bus driver circuits in computer systems
• Data transmission interfaces
• Digital signal buffering
• Memory interface circuits

Procurement Notes

Verify the manufacturer designation as Harris Corporation or its successors, such as Intersil or Renesas, due to corporate acquisitions. Confirm the specific suffix CTQM indicates the cut tape packaging variant. Ensure compliance with RoHS directives if required, noting that older Harris components may not meet current environmental standards. Cross-reference the DigiKey part number 2156-CD74FCT540CTQM-ND for accurate sourcing and availability checks.

Selection Notes

Select this component when an octal buffer with inverted outputs and three-state capability is required. The FCT series offers faster switching speeds compared to standard HCT logic. Ensure the application voltage aligns with the 4.5V to 5.5V operating range. The 20-QSOP package is suitable for space-constrained surface-mount designs. Verify thermal requirements against the specified operating temperature range.

Part Context

This component is part of the broader 74FCT family of high-speed CMOS logic devices produced by Harris Corporation. The FCT series was engineered to provide performance comparable to ECL while maintaining CMOS power efficiency. Harris Semiconductor was a significant player in the logic IC market before being acquired by Intersil, which later merged with Renesas Electronics. This lineage affects current datasheet availability and support channels.

Replacement Considerations

Direct replacements include other 8-bit inverting buffers with three-state outputs from the same FCT family, such as the CD74FCT540TQ. Verify pin compatibility and electrical specifications before substitution. Consider equivalent parts from manufacturers like Texas Instruments or ON Semiconductor if Harris/Intersil stock is unavailable.