MC74HC540ADW

Overview

The MC74HC540ADW is an octal inverting buffer and line driver utilizing high-performance silicon-gate CMOS technology. It features a 20-lead SOIC-20 wide package with inputs and outputs on opposite sides for simplified PCB layout. The device operates within a voltage range of 2.0 V to 6.0 V, supporting up to 15 LSTTL loads. Propagation delays range from 15 ns at 6.0 V to 80 ns at 2.0 V. Quiescent supply current is typically 4 µA at 25°C.

Feature Summary

• Octal inverting buffer design with dual active-low output enables
• Outputs directly interface to CMOS, NMOS, and TTL logic families
• High noise immunity characteristic of CMOS devices
• Inputs compatible with standard CMOS outputs

Applications

• 3-state memory address drivers
• Clock drivers
• Bus-oriented systems

Procurement Notes

Verify the specific suffix 'DW' corresponds to the SOIC-20 Wide package when sourcing. Confirm RoHS compliance status as indicated by the 'G' suffix or marking if environmental regulations apply to the procurement. Ensure the ordering information matches the required shipping quantity format, such as rail units for non-reel packaging.

Selection Notes

Select this component for applications requiring high-speed signal inversion across eight channels. The dual enable pins allow flexible control over bus states. Consider the operating temperature range of -55°C to +125°C for industrial environments. Verify that the input drive requirements align with the source logic family capabilities.

Part Context

This part belongs to the HC540A series of octal buffers. It is functionally similar to the HC541A but provides inverting outputs instead of non-inverting ones. The device shares pinout compatibility with LS540 equivalents, facilitating direct replacement in legacy designs while offering improved CMOS performance characteristics.

Replacement Considerations

The MC74HC541A serves as a functional alternative for non-inverting applications. Other variants within the HC540 family may offer different package options or automotive qualifications.