SN74HC540PW

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HC540PW is an octal buffer and line driver with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V, featuring high-current outputs capable of driving up to 15 LSTTL loads. The device provides inverted data at the outputs and utilizes a flow-through pinout arrangement where inputs and outputs are on opposite sides of the package to facilitate PCB layout. It includes two output-enable inputs (OE1 and OE2) configured as a 2-input NOR gate; if either is high, all outputs enter a high-impedance state. Typical propagation delay is 8 ns.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal buffers and line drivers with 3-state outputs
• Wide operating voltage range from 2 V to 6 V
• High-current outputs drive bus lines directly or up to 15 LSTTL loads
• Data flow-through pinout with inputs and outputs on opposite sides

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented transmissions
• Clock buffering and distribution
• Memory mapping control

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix against the current Package Option Addendum, as the PW variant status may differ from other packages in the series. Confirm RoHS compliance and lead finish details such as NIPDAU for active production versions. Check moisture sensitivity level ratings and peak reflow temperatures relevant to assembly processes. Ensure the selected part number matches the required thermal resistance and packaging quantity specifications for the intended application environment.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal buffer with inverted logic and 3-state capability is required for bus applications. The wide voltage range supports systems operating between 2 V and 6 V. Consider the flow-through pinout for simplified PCB routing compared to standard parallel layouts. Verify that the high-current drive capability meets the load requirements, such as driving multiple LSTTL loads or direct bus lines.

Buffers, Drivers, Receivers, Transceivers Part Context

The SN74HC540 belongs to the HC (High-speed CMOS) logic family, offering performance similar to the popular 'HC240 series but with a distinct pinout configuration. This family is designed for general-purpose digital applications requiring robust signal buffering and line driving capabilities across a broad voltage spectrum.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HC540PWR

Buffers, Drivers, Receivers, Transceivers FAQ

How does the 3-state control function work?

The 3-state control gate is a 2-input NOR. If either output-enable input (OE1 or OE2) is high, all eight outputs enter a high-impedance state.

What is the typical propagation delay?

The typical propagation delay (tpd) is 8 ns.