MC74HC240ADWG

Overview

The MC74HC240ADWG is an octal 3-state inverting buffer and line driver manufactured by onsemi. It operates within a supply voltage range of 2.0 V to 6.0 V and features two active-low output enables. The device utilizes high-performance silicon-gate CMOS technology, providing low input current and high noise immunity. It is housed in a SOIC-20 wide package (DW suffix) with 38 units per rail. Propagation delays vary from 14 ns at 6.0 V to 80 ns at 2.0 V.

Feature Summary

• Octal 3-state inverting buffer/line driver design
• Compatible with standard CMOS outputs and LSTTL outputs via pullup resistors
• Two active-low output enables for bus-oriented systems

Applications

• 3-state memory address drivers
• Clock drivers
• Sub-oriented systems

Procurement Notes

Verify the specific ordering suffix 'DWG' corresponds to the SOIC-20 Wide package configuration. Confirm RoHS compliance and Pb-free status as indicated by the 'G' suffix. Ensure environmental specifications match application requirements regarding moisture sensitivity level and operating temperature ranges.

Selection Notes

Select this component for applications requiring octal buffering with inverting logic and 3-state control. The HC series offers compatibility with both CMOS and TTL loads. Consider the SOIC-20 package dimensions and thermal resistance characteristics for PCB layout and heat dissipation planning.

Part Context

This part belongs to the MC74HC240A family of octal buffers. It shares pinout compatibility with LS240 devices. The 'DWG' designation specifies the SOIC-20 Wide package type with lead-free packaging. It is distinct from non-inverting variants like the HC244A.

Replacement Considerations

MC74HC240ADTR2G (TSSOP-20 variant)