MC74VHC540DT

Overview

The MC74VHC540DT is an octal bus buffer manufactured by onsemi, belonging to the VHC logic family. It features inverting functionality with three-state outputs and operates within a supply voltage range of 2V to 5.5V. The device utilizes a 20-pin TSSOP surface-mount package. Key electrical parameters include a maximum propagation delay of 12ns, output currents of 8mA for both high and low states, and an operating temperature range from -55°C to 125°C.

Feature Summary

• Octal bus buffer configuration with inverting logic function
• Three-state output capability for efficient bus management
• Wide operating voltage range supporting 2V to 5.5V systems
• High-speed operation compatible with CMOS and TTL standards

Applications

• Memory address and data bus drivers
• Clock distribution circuits
• Bidirectional bus transceivers
• TTL-to-CMOS level translation interfaces

Procurement Notes

Verify the specific suffix 'DT' against the manufacturer's current datasheet to confirm package dimensions and pinout compatibility. Ensure the component meets RoHS compliance requirements if mandated by your assembly process. Cross-reference the part number with official obsolescence notices to confirm active manufacturing status before finalizing procurement plans.

Selection Notes

Select this component when designing systems requiring wide voltage flexibility between 2V and 5.5V. The VHC series offers speed comparable to standard logic while maintaining lower power consumption. Consider the 20-TSSOP package constraints regarding PCB space and thermal dissipation capabilities during layout planning.

Part Context

This part belongs to the MC74VHC540 series of octal buffers. It serves as a digital interface solution for transferring data across buses. The VHC technology provides advanced performance characteristics suitable for modern embedded applications requiring reliable signal integrity and fast switching speeds.

Replacement Considerations

Check for MC74VHC540DTR2 or other suffix variants from onsemi. Verify functional equivalence with SN74VHC540 or CD74VHC540 from other manufacturers. Confirm package compatibility and electrical specifications match before substitution.