MC74HC540ADTR2

Overview

The MC74HC540ADTR2 is an octal inverting buffer and line driver manufactured by onsemi. It operates within a supply voltage range of 2.0 to 6.0 V and features two ANDed active-low output enables (OE1, OE2). The device provides high noise immunity and low input current characteristics typical of CMOS technology. It supports outputs directly interfacing with CMOS, NMOS, and TTL loads, driving up to 15 LSTTL loads. The component utilizes a TSSOP-20 package and includes inputs and outputs positioned on opposite sides of the package for efficient bus-oriented system design.

Feature Summary

• Octal inverting buffer configuration with dual active-low output enables
• Direct interface capability with CMOS, NMOS, and TTL logic families
• High noise immunity and low input current characteristics
• Outputs positioned on opposite package sides for optimized routing

Applications

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

Procurement Notes

Verify that the specific part number suffix matches the required package type and reel specifications. Confirm RoHS compliance status and Pb-free designation as indicated in the ordering information. Ensure the procurement source provides valid traceability documentation for automotive or industrial applications if the -Q suffix variant is required.

Selection Notes

Select this component when an octal inverting buffer with 3-state control is required for bus architectures. Consider the operating voltage range of 2.0 to 6.0 V for compatibility with various logic levels. Evaluate the propagation delay and transition times against system clock speeds. Verify that the TSSOP-20 package dimensions fit the PCB layout constraints.

Part Context

This device belongs to the HC540A series of high-performance silicon-gate CMOS logic integrated circuits. It shares pinout compatibility with LS540 devices while offering CMOS input/output characteristics. The family includes non-inverting variants like the HC541A. The component is designed for general-purpose digital buffering and line driving applications requiring high fan-out capabilities.

Replacement Considerations

MC74HC540ADWR2G