MC74ACT540DWR2

Overview

The MC74ACT540DWR2 is an octal buffer and line driver from the onsemi 74ACT logic family, housed in a 20-SOIC package. It features non-inverting outputs with three-state capability, operating within a supply voltage range of 4.5 V to 5.5 V. The device provides high drive strength with output currents of ±24 mA and low static power consumption of 8 µA. Propagation delay is specified at 7.5 ns at 5 V, supporting industrial temperature ranges from -40°C to +85°C.

Feature Summary

• Octal configuration providing eight independent non-inverting buffer channels
• Three-state output control for efficient bus-oriented communication
• High current drive capability suitable for driving capacitive loads
• CMOS technology ensuring low static power dissipation

Applications

• Clock buffering and distribution systems
• Memory address and data bus drivers
• Signal isolation between different logic domains
• Industrial control system interface circuits

Procurement Notes

Verify the complete part number suffix, as 'DWR2' typically indicates specific tape-and-reel packaging configurations distinct from tube variants like 'DTG'. Confirm RoHS compliance status and moisture sensitivity level (MSL) ratings prior to integration into surface-mount assembly processes to ensure supply chain accuracy.

Selection Notes

Select this component when designing systems requiring high-speed octal buffering with three-state control under standard 5V logic conditions. Compare against HC series alternatives if lower voltage operation or higher noise immunity is required, noting that ACT series offers faster switching speeds but operates strictly within the 4.5V to 5.5V supply window.

Part Context

This device belongs to the MC74ACT541/540 family, where the 540 variant specifically denotes inverting functionality, while the 541 represents non-inverting buffers. Both share identical pinouts and electrical characteristics, differing primarily in signal polarity. The DWR2 suffix identifies the wide-body SOIC package format optimized for automated surface-mount placement.

Replacement Considerations

Direct functional substitutes include the MC74ACT541DWR2G for non-inverting applications and the MC74AC540DWR2G for AC-series speed equivalents. Verify pin compatibility and electrical specifications before swapping with generic 74ACT clones.