MC74HC540ADWG

Overview

The MC74HC540ADWG is an octal inverting buffer, line driver, and line receiver manufactured by onsemi. It utilizes high-performance silicon-gate CMOS technology and operates within a supply voltage range of 2.0 V to 6.0 V. The device features two active-low output enables (OE1, OE2) that function as ANDed controls; when either enable is high, all eight outputs enter a high-impedance state. It provides a drive capability of 15 LSTTL loads and includes input protection diodes. The component is housed in a SOIC-20 wide package.

Feature Summary

• Octal inverting buffer with dual active-low output enables for bus-oriented systems
• High noise immunity characteristic of CMOS devices with low input current
• Outputs directly interface to CMOS, NMOS, and TTL logic families
• Inputs and outputs located on opposite sides of the package for PCB layout convenience

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm package type and shipping quantity. The DW suffix indicates a SOIC-20 Wide package typically shipped in rails. Confirm RoHS compliance and lead-free status requirements for your assembly process. Ensure the application environment stays within the recommended operating temperature range of -55°C to +125°C.

Selection Notes

Select this component when an octal inverting buffer with 3-state control is required for bus applications. It serves as a pin-compatible replacement for LS540 devices. Consider the MM74HC541A if non-inverting outputs are needed instead. Verify that the system voltage falls between 2.0 V and 6.0 V and that the load requirements do not exceed the specified drive capabilities.

Part Context

This part belongs to the HC540A series of octal buffers. It shares the same pinout as the LS540 but offers CMOS advantages such as lower power consumption and higher noise immunity. The device is designed for general-purpose digital buffering and driving tasks where signal inversion and tri-state isolation are necessary.

Replacement Considerations

The MM74HC541A is a functional equivalent with non-inverting outputs. For automotive applications requiring unique site control, consider parts with the -Q suffix, such as MC74HC540ADTR2G-Q.