74LCX244BQX

Overview

The 74LCX244BQX is a low-voltage CMOS octal buffer with 5 V-tolerant inputs and outputs. It operates within a supply voltage range of 2 V to 3.6 V. The device features two non-inverting buffers, each containing four bits, providing eight channels in total. Outputs are three-state controlled by independent enable inputs. It utilizes a 20-DQFN package measuring 2.5x4.5 mm. High-level and low-level output currents are rated at 24 mA. Operating temperature spans from -40°C to +85°C.

Feature Summary

• Provides five-volt tolerant input and output capabilities for mixed-voltage system interfacing
• Supports live insertion and withdrawal through power-down high-impedance states
• Integrates patented noise and EMI reduction circuitry for signal integrity

Applications

• Memory address driver circuits
• Clock distribution networks
• Bus-oriented transmitter and receiver interfaces

Procurement Notes

Verify the specific suffix BQX corresponds to the 20-DQFN package configuration. Confirm RoHS compliance status as per the latest manufacturer declaration. Check moisture sensitivity level requirements for surface mount assembly processes. Ensure ordering codes match the required tape and reel or cut tape packaging options available from distributors.

Selection Notes

Select this component when low voltage operation between 2 V and 3.6 V is required alongside 5 V compatibility. The 24 mA drive capability supports moderate capacitive loads. The compact DQFN footprint suits space-constrained designs. Verify that the 6.5 ns propagation delay meets timing constraints for the target bus speed.

Part Context

This part belongs to the 74LCX family of low-voltage CMOS logic devices. It serves as an octal buffer alternative to higher voltage HC or HCT series parts. The LCX technology offers faster switching speeds than standard LVC families while maintaining lower power consumption. It replaces older LS or ALS technologies in modern portable electronics.

Replacement Considerations

MC74LCX244A is a documented equivalent variant from the same manufacturer.