SN74HC540DWRE4

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HC540DWRE4 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 and features inverted data at the outputs. The device utilizes a 2-input NOR gate for 3-state control, where high signals on either OE1 or OE2 inputs place all eight outputs in a high-impedance state. It provides high-current outputs capable of driving bus lines directly or up to 15 LSTTL loads. The component includes dual output enable inputs and offers low power consumption with a maximum ICC of 80 μA.

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 3-state outputs drive bus lines directly
• Dual output enable (OE1 and OE2) inputs

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented systems
• Clock distribution
• Memory modules

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'E4' against the manufacturer's current package option addendum to confirm RoHS compliance status and lead finish specifications. Ensure the SOIC-20 package dimensions match the design requirements. Confirm that the moisture sensitivity level and reflow temperature profiles align with the assembly process capabilities.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal buffer with inverted logic and bidirectional capability via 3-state outputs is required. The wide voltage range supports various digital logic families. Consider the pinout arrangement with inputs and outputs on opposite sides for PCB layout optimization. Verify that the input transition rise/fall times meet the system timing requirements.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SNx4HC540 family of octal buffers and line drivers. It shares functional similarities with the HC240 series but distinguishes itself through its specific pinout configuration. The device is designed for high-performance applications requiring multiple buffered outputs with controlled impedance states.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HC540DWR

Buffers, Drivers, Receivers, Transceivers FAQ

How does the 3-state control function operate?

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

What is the polarity of the outputs?

The devices provide inverted data at the outputs relative to the inputs.