MC74LCX540DW

Overview

The MC74LCX540DW is an octal buffer and line driver manufactured by onsemi, belonging to the LCX logic family. It features eight inputs and eight outputs with inverting polarity and three-state output capability. The device operates within a supply voltage range of 1.65 V to 3.6 V. Key electrical parameters include a maximum propagation delay of 8 ns at 3.3 V and low static current consumption of 20 µA. It is housed in a 20-SOIC wide package and supports industrial operating temperatures from -40 °C to +85 °C.

Feature Summary

• Provides octal buffering and line driving capabilities for high-density bus applications
• Features three-state outputs to facilitate direct connection to system buses
• Designed for low-voltage operation compatible with 3.3 V systems
• Includes input clamp diodes to suppress transient voltages

Applications

• Memory address drivers for portable electronic devices
• Clock distribution circuits in low-power systems
• Bus-oriented transmitters and receivers
• Output ports for microprocessors requiring reduced power consumption

Procurement Notes

Verify the specific suffix 'DW' corresponds to the SOIC-Wide-20 package configuration required for your PCB layout. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure moisture sensitivity level handling procedures are followed during assembly to maintain component reliability.

Selection Notes

Select this component when designing systems requiring octal buffering with low voltage compatibility. Compare propagation delays against system timing requirements to ensure signal integrity. Evaluate power consumption constraints to determine if the LCX series offers sufficient efficiency compared to standard CMOS alternatives.

Part Context

This part belongs to the 74LCX series of advanced low-voltage CMOS logic devices. It serves as a functional equivalent to other octal buffers but optimized for lower supply voltages. The device complements the broader 74xx logic family by providing solutions for modern low-power digital interfaces.

Replacement Considerations

Check for pin-compatible alternatives such as the MC74AC540 or MC74LVX540, noting differences in supply voltage ranges and drive strengths. Verify that substitute components meet the same package and thermal specifications.