SN74ALS540N

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALS540N is an octal buffer and line driver from the Texas Instruments SN74ALS series. It features eight inverting buffers with three-state outputs, designed for high-speed digital signal buffering and driving applications. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports a maximum operating temperature of +70°C. It utilizes a 20-pin DIP package and provides significant drive capability with low-level output currents up to 24 mA and high-level output currents of -15 mA.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal configuration providing eight independent inverting buffer channels
• Three-state output control allowing bus-oriented connections
• High-speed ALS logic technology for reduced propagation delay
• Robust drive capability suitable for interfacing with high-capacitance loads

Buffers, Drivers, Receivers, Transceivers Applications

• Memory address buffering in computer systems
• Clock distribution circuits
• Bus-oriented architectures requiring signal isolation
• I/O port expansion interfaces

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'N' confirms the PDIP-20 through-hole package variant. Confirm RoHS compliance status as it may vary by production batch or region. Check for obsolescence notices since ALS series components are legacy technologies. Ensure the manufacturer source is explicitly Texas Instruments to avoid counterfeit risks associated with older logic families.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when eight inverting buffers with three-state control are required in a through-hole design. Compare against SN74ALS541 if non-inverting functionality is needed instead. Consider power consumption differences compared to standard 74LS series devices. Verify that the 5V logic level compatibility matches the system requirements.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74ALS (Advanced Low-power Schottky) family, known for faster switching speeds than standard LS logic while maintaining lower power dissipation. The SN74ALS540 specifically serves as an octal buffer, contrasting with other ALS parts like the SN74ALS08 (AND gates) or SN74ALS520 (comparators). It is a legacy bipolar logic IC widely used in historical computing hardware designs.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Direct pin-compatible substitutes include the SN74ALS540DW (SOIC-20 package) for surface mount transitions. Other ALS series buffers such as the SN74ALS541 offer non-inverting alternatives. Verify electrical specifications match exactly before substituting with generic equivalents.