MC74LCX540DT

Overview

The MC74LCX540DT is an octal buffer and line driver manufactured by onsemi, belonging to the LCX logic family. It features three-state outputs and operates within a supply voltage range of 2.0 V to 3.6 V. The device contains eight non-inverting buffers with high noise immunity and low power consumption. It is housed in a surface-mount SOIC-20 package. Key electrical parameters include a maximum propagation delay of 14 ns at 3.3 V with a 50 pF load, and output drive capabilities of ±24 mA. The operating temperature range extends from -40 °C to +85 °C.

Feature Summary

• Octal configuration providing eight independent non-inverting buffers for parallel data handling
• Three-state output architecture enabling direct connection to system buses without external switches
• Low voltage operation compatible with 3.3 V systems while maintaining CMOS input compatibility

Applications

• Memory address drivers for portable electronic devices
• Clock distribution circuits in consumer electronics
• Bus-oriented transmitters and receivers in communication modules

Procurement Notes

Verify the specific suffix 'DT' against the manufacturer's current datasheet to confirm the exact tape-and-reel packaging quantity and marking specifications. Ensure the component meets RoHS compliance requirements for your region. Cross-reference the date code and lot number with onsemi quality documentation to confirm authenticity and traceability before integration into production lines.

Selection Notes

Select this component when designing low-voltage digital interfaces requiring high density and low power consumption. The LCX series offers superior speed compared to older LVX technologies while maintaining compatibility with 3.3 V logic levels. Consider the SOIC-20 package size relative to available PCB space and thermal dissipation requirements for the specific application environment.

Part Context

This part belongs to the LCX logic family, which bridges the performance gap between LVC and LVX technologies. It is designed for applications demanding fast switching speeds and low static power consumption. The octal buffer format allows for efficient management of multiple signal lines simultaneously, making it suitable for complex digital systems where board space is limited.

Replacement Considerations

Check for MC74LCX540MTC as a pin-compatible alternative in TSSOP packaging. Verify functional equivalence with MC74LCX540DTR for different reel quantities. Confirm that any substitute maintains the same 3.3 V operating voltage and three-state output characteristics.