MC74VHC240DWR2

Overview

The MC74VHC240DWR2 is an octal buffer and line driver manufactured by onsemi, belonging to the 74VHC logic series. It features two independent four-bit elements with inverted outputs and three-state capability. The device operates within a supply voltage range of 2V to 5.5V and supports output currents of 8mA for both high and low states. Packaged in a 20-SOIC surface-mount format, it functions across a temperature range of -40°C to 85°C. This component is officially classified as obsolete and no longer manufactured.

Feature Summary

• Octal configuration providing eight input lines and corresponding outputs within a single integrated circuit package.
• Three-state output architecture allowing direct connection to bus systems without additional control logic.
• CMOS technology ensuring low static power consumption while maintaining high-speed signal buffering capabilities.

Applications

• Bus-oriented memory mapping
• Clock distribution drivers
• Data register buffering

Procurement Notes

This specific part number is confirmed as obsolete and no longer manufactured by onsemi. Procurement must focus on verified replacement components rather than original stock. Buyers should validate that substitute devices meet identical pinout, electrical specifications, and thermal requirements. Direct replacements from the same manufacturer are preferred to ensure compatibility. Verify RoHS compliance status when selecting alternatives, as environmental regulations may differ between legacy and current product lines.

Selection Notes

Selection requires identifying active substitutes due to the discontinuation of this model. The MC74VHC240DWR2G is documented as a direct replacement offering identical functionality within the same package. Alternative families such as SN74AHC240 provide similar performance but require verification of voltage thresholds and drive strength. Ensure the chosen replacement maintains the 20-SOIC footprint and supports the required 2V to 5.5V operating range for seamless integration into existing designs.

Part Context

The MC74VHC240DWR2 belongs to the broader 74VHC family of high-speed CMOS logic devices produced by onsemi. This series is designed for applications requiring fast propagation delays and wide operating voltage ranges. The 240 variant specifically addresses octal buffering needs, distinguishing itself from hex buffers or non-inverting drivers. As part of the standard industrial logic lineup, it was widely used in digital systems before being superseded by newer manufacturing iterations.

Replacement Considerations

The MC74VHC240DWR2G is listed as a direct replacement. Other similar options include Texas Instruments parts like SN74AHC240NSR, though these belong to different logic families and require electrical validation.