SN74LS540NS

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LS540NS is an octal buffer and line driver manufactured by Texas Instruments. It features eight inverting outputs with three-state capability, allowing for effective bus-oriented communication. The device operates within a supply voltage range of 4.75V to 5.25V and supports a propagation delay of 15ns at 5V. It provides high-level output current of -15mA and low-level output current of 24mA. Designed for surface-mount applications, it utilizes a 20-pin Small Outline Package (SOP) with a standard operating temperature range of 0°C to 70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides eight inverting outputs with three-state control for efficient bus management
• Supports direct interface between logic circuits and high-current or capacitive loads
• Features independent output enable controls for flexible system configuration

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented systems requiring signal buffering
• Memory address drivers for data buses
• Clock drivers and buffer circuits

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific package suffix 'NS' corresponds to the 20-pin SOP variant when ordering. Confirm RoHS compliance status and lead finish details via the official TI packaging addendum. Ensure the procurement channel sources from authorized distributors to guarantee component authenticity and traceability.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring octal buffering with active-low output enable functionality. Consider the LS logic family characteristics regarding power consumption and speed relative to other series. Verify that the 20-pin SOP footprint aligns with the target PCB layout constraints and thermal requirements.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the Texas Instruments SN74LS540 family of octal buffers. It serves as a catalog version of the military-grade SN54LS540. The device is designed for general-purpose digital applications where reliable signal transmission and bus isolation are required.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LS540N

Buffers, Drivers, Receivers, Transceivers FAQ

What is the function of the output enable pin?

The output enable pin controls the three-state condition of all eight outputs simultaneously, allowing them to be placed in a high-impedance state.

Is the SN74LS540NS compatible with standard TTL logic levels?

Yes, it is part of the LS TTL family and is designed to interface directly with standard transistor-transistor logic inputs.