MC74VHCT240AMELG

Overview

The MC74VHCT240AMELG is an octal bus buffer and line driver from onsemi's VHCT logic family. It features eight inverting channels with three-state outputs, fabricated using silicon gate CMOS technology. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports surface-mount installation in a 20-pin SO EIAJ package. Designed for high-speed applications, it provides low static current consumption and robust output drive capabilities suitable for data bus architectures.

Feature Summary

• Octal configuration with eight independent inverting signal paths
• Three-state output control for efficient bus sharing
• High-speed CMOS fabrication for rapid signal propagation
• Compatible with standard TTL input levels

Applications

• Data bus buffering in computer systems
• Memory module interface drivers
• High-speed communication port buffers
• General-purpose octal line driving

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm package integrity upon receipt as the part utilizes tape and reel or bulk packaging. Check manufacturing date codes against project requirements. Ensure storage conditions comply with moisture sensitivity level specifications. Validate pin alignment and solderability before integration into final assemblies.

Selection Notes

Select this component when eight-channel inverting buffering is required at 5 V logic levels. The VHCT series ensures compatibility with TTL inputs while maintaining CMOS noise immunity. Consider the 20-pin SO EIAJ footprint for PCB layout constraints. Evaluate propagation delay specifications against system timing requirements. Verify thermal dissipation needs based on expected load currents.

Part Context

This part belongs to onsemi's VHCT logic family, which bridges HC and HCT performance characteristics. The MC74VHCT240A variant specifically offers enhanced speed over standard HCT devices. It serves as a direct replacement for legacy octal buffers in industrial and consumer electronics. The family emphasizes low power consumption alongside high switching speeds.

Replacement Considerations

The MC74VHCT240AMELG is listed as obsolete. Equivalent functional replacements include the MC74VHCT240ADTR2G in TSSOP-20 packaging or the MC74VHCT240ADWG in SOIC-20 format. Verify pinout compatibility and electrical parameters before substitution.