MC74HC540ANG

Overview

The MC74HC540ANG is an octal inverting buffer, line driver, and line receiver fabricated with high-performance silicon-gate CMOS technology. It features a 20-lead SOIC package with inputs and outputs on opposite sides. The device operates within a voltage range of 2.0 V to 6.0 V and includes two ANDed active-low output enables (OE1, OE2). Propagation delays are guaranteed up to 120 ns at -55°C and 15 VCC. It provides low input current and high noise immunity.

Feature Summary

• Octal inverting buffer/line driver/line receiver design
• Two ANDed active-low output enables for bus-oriented systems
• Inputs compatible with Standard CMOS and LSTTL outputs via pull-up resistors
• High noise immunity characteristic of CMOS devices

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and shipping quantity. Ensure the selected variant meets the required operating temperature range and voltage specifications for the target application environment.

Selection Notes

Select this component for applications requiring octal buffering with inverted logic levels. Consider the HC541A if non-inverting outputs are needed instead. Verify that external pull-up resistors are included if interfacing directly with LSTTL outputs.

Part Context

This device belongs to the HC540A series of octal buffers. It shares pinout compatibility with LS540 devices but utilizes CMOS technology for lower power dissipation. The 'ANG' suffix indicates a lead-free, RoHS-compliant SOIC-20 package configuration.

Replacement Considerations

MC74HC540ADWG

FAQ

How are the output enable pins configured?

The device has two ANDed active-low output enable pins (OE1 and OE2). Outputs are enabled only when both pins are low; otherwise, they assume a high-impedance state.

What is the input compatibility status?

Inputs are compatible with Standard CMOS outputs. External pull-up resistors are required to make them compatible with LSTTL outputs.