MM74HCT540N

Buffers, Drivers, Receivers, Transceivers Overview

The MM74HCT540N is an inverting octal buffer and line driver manufactured by onsemi, belonging to the HCT logic series. It features eight inputs and eight outputs with three-state capability, housed in a 20-pin DIP package. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a propagation delay of 30 ns at 5 V, high-level output current of -7.2 mA, low-level output current of 7.2 mA, and static current of 8 uA. It supports surface mount or through-hole installation styles depending on the specific variant, with an operating temperature range from -40°C to +85°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides inverting buffering for eight independent signal lines simultaneously
• Features three-state outputs allowing direct connection to system buses
• Utilizes HCT CMOS technology for compatibility with TTL inputs

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented memory and address drivers
• Clock drivers and buffer circuits
• Line driving applications requiring inversion

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the exact suffix against official datasheets as 'N' typically denotes a DIP package, but confirm availability status directly with the manufacturer or authorized distributors. Check RoHS compliance markings and ensure the component matches the required pin configuration for your PCB layout. Cross-reference ordering information with the latest product change notices to avoid obsolete stock.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an inverting function is required for bus isolation or signal buffering in 5V logic systems. Ensure the design accommodates the 30 ns propagation delay and that the load does not exceed the specified output current limits. Verify that the DIP package fits the assembly constraints compared to SOIC or TSSOP alternatives available in the same family.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the MM74HCT540 family of octal buffers. It shares functional similarities with non-inverting variants like the MM74HCT541. The HCT series is designed to interface directly with TTL circuits while offering CMOS noise immunity. Other packages in this series include SOIC-20 and TSSOP-20 options for different mounting requirements.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Direct substitutes include the MM74HCT540M (SOIC) or MM74HCT540MTCX (TSSOP) for pin-compatible replacements with different packaging. Non-inverting equivalents such as the MM74HCT541 may be used if inversion is not required.