CD74FCT541ATQM

Overview

The CD74FCT541ATQM is an octal buffer and line driver manufactured by Harris Corporation, belonging to the FCT logic series. It features eight non-inverting inputs with three-state outputs housed in a 20-pin QSOP package. The device operates within a supply voltage range of 4.75 V to 5.25 V and supports a load capacitance of 50 pF. It provides high drive capability with a low-level output current of 64 mA and a high-level output current of -32 mA. The component functions at temperatures between -40 °C and +85 °C, with a propagation delay of 4.8 ns at 5 V.

Feature Summary

• Octal bus driver architecture providing eight independent non-inverting channels for data buffering.
• Three-state output design allowing direct connection to bus structures without external pull-up resistors.
• High-drive CMOS technology enabling robust signal transmission across system buses.

Applications

• Memory module address and data bus buffering
• Clock distribution networks requiring high fan-out
• Control signal routing in industrial automation systems

Procurement Notes

Verify the manufacturer designation carefully, as Harris Corporation's semiconductor assets were acquired by Texas Instruments. Confirm that the specific part number corresponds to the original Harris production run or the subsequent TI continuation if required for compatibility. Ensure the QSOP-20 package matches the target PCB footprint and check RoHS compliance status against project specifications.

Selection Notes

Select this component when an octal buffer with strong drive currents is needed for 5 V CMOS systems. The FCT series offers faster switching speeds compared to standard HC logic. Consider the 20-pin QSOP package constraints and ensure thermal management aligns with the specified operating temperature range for reliable performance in dense circuit layouts.

Part Context

This device is part of the broader 74FCT family of high-speed CMOS logic devices originally developed by Fairchild Semiconductor and later produced by Harris Corporation before asset transfers. The 541 variant specifically serves as an octal buffer, widely used in digital systems for isolating and driving bus lines. Its design emphasizes speed and drive strength suitable for mid-density digital applications.

Replacement Considerations

The CY74FCT541ATQCT from Texas Instruments is a confirmed substitute part number sharing identical electrical characteristics and pinout configuration. Verify package compatibility between the ATQM and ATQT suffixes before substitution.