MC74LCX244MELG

Overview

The MC74LCX244MELG is a low-voltage CMOS octal buffer and line driver from the LCX logic family. It features eight non-inverting channels with three-state outputs, operating within a supply voltage range of 1.65 V to 3.6 V. The device provides high-impedance TTL-compatible inputs and outputs tolerant up to 5.5 V. Packaged in a 20-pin TSSOP surface-mount configuration, it supports hot insertion and includes IOFF circuitry for partial-power down isolation.

Feature Summary

• Provides eight non-inverting buffered channels with three-state output control
• Features 5 V-tolerant inputs and outputs for seamless interface with legacy systems
• Supports hot insertion and partial-power down via IOFF specifications

Applications

• Memory address driving in portable electronic devices
• TTL-to-LVCMOS level translation interfaces
• Bus-oriented receiver and transmitter applications

Procurement Notes

Verify the complete part number including the MELG suffix to confirm the specific TSSOP-20 package variant. Ensure compatibility with the required 1.65 V to 3.6 V supply range and check for RoHS compliance requirements. Confirm that the 5 V tolerance specification meets the input signal levels of the interfacing system.

Selection Notes

Select this component when an octal buffer with three-state capability is required for low-voltage logic families. It is suitable for designs needing interface between 3.3 V or lower logic domains and 5 V tolerant buses. Consider the TSSOP-20 package constraints and ensure thermal management aligns with the specified operating temperature range.

Part Context

This component belongs to the onsemi LCX series, designed for low-voltage applications requiring high performance. The LCX family utilizes advanced silicon gate CMOS technology to achieve low power consumption while maintaining speed comparable to older technologies. The MC74LCX244 variant specifically addresses the need for wide bus buffering in modern portable electronics.

Replacement Considerations

Direct substitutes include MC74LCX244DWG and MC74LCX244MTDX, which share identical logical functionality but differ in packaging such as SOIC or smaller TSSOP options. Verify pinout compatibility and package dimensions before substitution.