MC74VHCT240ADWRG

Overview

The MC74VHCT240ADWRG is an octal inverting buffer and line driver manufactured by onsemi, belonging to the VHCT logic series. It features a 20-SOIC surface-mount package with eight input and eight output lines. The device provides three-state outputs and operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a propagation delay of 6.1 ns, high-level output current of -8 mA, low-level output current of 8 mA, and static current of 1.35 mA. It functions reliably across an operating temperature range from -40°C to +85°C.

Feature Summary

• Octal configuration providing eight independent inverting buffer channels for parallel data handling.
• Three-state output capability allowing direct connection to bus structures without external drivers.
• VHCT technology ensures TTL-compatible input levels while maintaining CMOS performance characteristics.

Applications

• Bus-oriented memory and address drivers
• Clock drivers and buffering
• TTL-to-CMOS level translation

Procurement Notes

Verify the specific suffix 'G' indicates RoHS compliance and green manufacturing status as per onsemi standards. Confirm the package type matches the required SOIC-20 footprint for PCB layout. Ensure the ordering part number aligns exactly with the datasheet specifications to avoid functional discrepancies related to voltage or speed grades.

Selection Notes

Select this component when an octal inverting buffer with three-state control is required for 5V systems. The VHCT series is suitable for applications needing TTL-compatible inputs with improved switching speeds compared to standard HCT devices. Consider the 20-SOIC package constraints and thermal dissipation requirements for the specified current loads.

Part Context

This component is part of the MC74VHCT240A family, which includes variants like MC74VHCT240ADWR2G. The VHCT series bridges the gap between HC and HCT logic families, offering faster propagation delays while maintaining compatibility with standard TTL input thresholds. It is designed for high-density digital applications requiring reliable signal integrity.

Replacement Considerations

Direct substitutes include MC74VHCT240ADWR2G. Verify pinout and electrical specifications match before substitution. Cross-vendor equivalents require careful analysis of input/output characteristics and package dimensions to ensure functional compatibility.