MC74VHC240DTR2

Overview

The MC74VHC240DTR2 is an octal buffer and line driver manufactured by onsemi, belonging to the 74VHC logic series. It features two independent inverters with four bits per element, providing tri-state outputs for bus-oriented applications. The device operates within a supply voltage range of 2V to 5.5V and supports surface mount installation in a 20-TSSOP package. It delivers output currents of 8mA for both high and low states, with a propagation delay of 11ns. The component is rated for an operating temperature range of -40°C to +85°C.

Feature Summary

• Octal configuration with dual inverters offering tri-state control capabilities
• CMOS technology ensuring low static current consumption
• Wide operating voltage range supporting 2V to 5.5V systems

Applications

• Bus-oriented memory and data acquisition systems
• Clock drivers and timing circuits
• High-speed data transmission lines

Procurement Notes

Verify component authenticity as this part number is obsolete and no longer manufactured. Confirm RoHS compliance status, as original versions may not meet current environmental standards. Check for direct replacements like the MC74VHC240DTR2G which includes Green packaging suffixes. Ensure availability through authorized distributors or surplus channels due to discontinuation status.

Selection Notes

Select this component for designs requiring octal buffering with inverting functionality and tri-state output control. Consider the 74VHC series characteristics for compatibility with 3.3V and 5V logic families. Evaluate the 20-TSSOP package constraints for PCB layout. Verify that the 11ns propagation delay meets system timing requirements. Note the obsolete status when planning long-term production runs.

Part Context

This integrated circuit belongs to the 74VHC family of high-speed CMOS logic devices produced by onsemi. The VHC series is designed to be pin-compatible with 74HC devices while offering faster switching speeds. The MC74VHC240 specifically provides octal buffering with inverters, making it suitable for driving heavy loads or isolating buses in digital communication architectures.

Replacement Considerations

Direct substitute: MC74VHC240DTR2G. Cross-manufacturer alternative: SN74AHC240PW.