74LCX540BQX

Overview

The 74LCX540BQX is an 8-bit bus driver from the ON Semiconductor LCX series, housed in a 20-DQFN package. It features inverted outputs and operates within a supply voltage range of 2V to 3.6V. The device provides three-state outputs with a drive capability of 24mA for both high and low states. It functions as a single-function logic component designed for surface mount applications across a temperature range of -40°C to 85°C.

Feature Summary

• Provides eight bits of inverted buffering with three-state output control
• Operates on low voltage supplies ranging from 2V to 3.6V
• Delivers strong output drive current of 24mA at 3.0V

Applications

• Memory buffer applications requiring level shifting
• Clock drivers and buffering in low voltage systems
• Data bus transceivers for portable electronic devices

Procurement Notes

Verify the specific manufacturer designation, as this part number may be associated with ON Semiconductor or its predecessor entities like Motorola. Confirm the exact package marking and date code against the official datasheet to ensure authenticity. Check for any obsolete status notifications or lifecycle changes that might affect long-term availability.

Selection Notes

Select this component when an 8-bit inverting buffer with three-state capability is required for low voltage logic interfaces. Ensure the system operating voltage remains within the 2V to 3.6V range. Consider the 20-DQFN footprint constraints during PCB layout. Verify that the 24mA drive current meets the load requirements of the destination circuitry without exceeding thermal limits.

Part Context

This device belongs to the 74LCX family of low-voltage CMOS logic components. It serves as a specialized buffer variant within the broader LCX series, which is optimized for high-speed operation and low power consumption. The LCX line is designed to replace older HC/HCT technologies in modern low-voltage digital designs.