MC74HC540AN

Overview

The MC74HC540AN is an octal inverting buffer, line driver, and line receiver manufactured by onsemi. It utilizes high-performance silicon-gate CMOS technology and features a 20-pin DIP package. The device operates within a supply voltage range of 2.0 V to 6.0 V. Key electrical parameters include a maximum propagation delay of 80 ns at 2.0 V and 15 ns at 6.0 V. Output drive capability supports up to 15 LSTTL loads, with low input current of 1 µA.

Feature Summary

• Octal inverting buffer/line driver/line receiver design
• Outputs directly interface to CMOS, NMOS, and TTL logic families
• Two ANDed active-low output enables for bus-oriented systems
• High noise immunity characteristic of CMOS devices

Applications

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

Procurement Notes

Verify the specific suffix 'AN' against official ordering information, as datasheets primarily list DWG (SOIC) and DTG (TSSOP) packages. Confirm RoHS compliance status and lead-free marking requirements. Ensure compatibility with standard CMOS outputs or external pull-up resistors for LSTTL compatibility.

Selection Notes

Select this component for applications requiring octal buffering with inverted outputs. Compare against HC541A if non-inverting functionality is needed. Verify that the 2.0 V to 6.0 V operating range meets system power constraints. Consider the 15 LSTTL load drive capability for interfacing requirements.

Part Context

This part belongs to the HC540A series of octal buffers. It is functionally similar to the LS540 but offers CMOS low power dissipation. The device is pin-compatible with other standard logic families, facilitating direct replacement in existing designs without layout changes.

Replacement Considerations

MC74HC540ADWG (SOIC-20), MC74HC540ADTG (TSSOP-20). Verify package type compatibility before substitution.