CD74FCT540TQM

Overview

The CD74FCT540TQM is an 8-bit bus driver from the Fast CMOS (FCT) series manufactured by Harris Corporation. It features inverted outputs with three-state capability and operates on a single 5V supply. The device utilizes a 20-pin Small Outline Integrated Circuit (SOIC) package, specifically designated as TQM. Key electrical characteristics include a maximum output current of 24mA and a typical propagation delay of 3.6ns at 5V. It supports a wide operating temperature range from -40°C to 85°C, ensuring reliability in industrial environments.

Feature Summary

• Provides high-speed data transfer via fast CMOS technology
• Features independent output enable controls for each direction
• Offers three-state outputs to facilitate bus line sharing
• Includes inverted logic functionality for signal processing

Applications

• High-speed data bus drivers in computer systems
• Clock driver circuits requiring low skew
• Memory address decoding buffers
• Control signal distribution networks

Procurement Notes

Verify the manufacturer origin, as Harris Corporation's semiconductor assets were acquired by Texas Instruments. Confirm the specific suffix 'TQM' corresponds to the correct tape-and-reel packaging and pin configuration. Ensure compatibility with existing FCT-series logic families in the design. Check for RoHS compliance status depending on the production batch date. Validate that the component meets the required thermal and electrical specifications for the target application environment.

Selection Notes

Select this component when designing systems requiring 8-bit bidirectional data transfer with high speed and low power consumption. The FCT series offers superior performance compared to standard TTL or HC logic families. Consider the three-state feature for managing multiple devices on a shared bus. Evaluate the package size constraints against the available PCB space. Ensure the voltage levels match the system's 5V logic requirements.

Part Context

This part belongs to the Harris CD74FCT family of high-speed CMOS logic devices. The FCT series was designed to bridge the performance gap between TTL and CMOS technologies. Harris Corporation was a prominent manufacturer before its semiconductor division was integrated into Texas Instruments. The CD74FCT540 variant specifically addresses applications needing buffered, inverted data transmission with robust drive capabilities.

Replacement Considerations

Texas Instruments SN74FCT540TQ is a direct functional equivalent. Verify pinout compatibility and electrical parameters before substitution. Other FCT-series bus drivers may serve similar roles but differ in bit width or output polarity.