MC74HCT541AFG

Overview

The MC74HCT541AFG is an octal 3-state non-inverting buffer, line driver, and line receiver manufactured by onsemi. It belongs to the HCT logic series, ensuring TTL compatibility while utilizing CMOS technology. The device features a 20-pin SOIC package with inputs and outputs located on opposite sides of the housing. It operates within a supply voltage range of 4.5V to 5.5V and supports bidirectional data transfer. Key electrical characteristics include a maximum propagation delay of 33ns at 5V and output drive capabilities of 6mA for both high and low states.

Feature Summary

• Octal configuration providing eight independent non-inverting channels
• Three-state output control allowing bus-oriented system integration
• TTL-compatible input thresholds for direct interface with standard logic
• Bidirectional data flow capability between A and B ports

Applications

• Memory address drivers in computer systems
• Clock signal distribution networks
• Bus-oriented communication architectures
• General-purpose level shifting between TTL and CMOS domains

Procurement Notes

Verify the specific suffix 'FG' against official onsemi documentation to confirm package dimensions and tape/reel specifications. Ensure the ordering part number matches the required RoHS compliance status and moisture sensitivity level. Cross-reference the manufacturer's latest datasheet revision to confirm active status and any potential pinout variations compared to legacy equivalents.

Selection Notes

Select this component when interfacing TTL-level sources with CMOS loads requiring high noise immunity. The HCT series ensures voltage compatibility without external pull-up resistors. Consider the 3-state enable functionality for multiplexed bus applications. Verify that the operating temperature range meets the environmental requirements of the target application.

Part Context

This component is part of the 74HCT541 family of octal buffers. It shares functional similarities with the HC541 but offers improved switching speeds and TTL-compatible input levels. The device is designed for high-density PCB layouts due to its surface-mount packaging. It serves as a critical interface element in digital systems requiring robust signal buffering and direction control.

Replacement Considerations

Direct substitutes include MC74HC541AFG and MM74HCT541MTCX. Verify voltage compatibility and package footprint before substitution. Note that HC variants may have different propagation delays and input current characteristics compared to HCT versions.