74LCX244SJ

Overview

The onsemi 74LCX244SJ is a low-voltage CMOS octal buffer and line driver featuring non-inverting logic with three-state outputs. Designed for operation within a supply voltage range of 1.65V to 3.6V, it provides high-speed performance while maintaining low power dissipation. The device incorporates 5V tolerant inputs and outputs, allowing safe interfacing between low-voltage components and 5V signal environments. It supports live insertion and withdrawal capabilities through IOFF circuitry, which ensures high-impedance states during partial power-down conditions.

Feature Summary

• Features five-volt tolerant inputs and outputs for direct interface with mixed voltage systems
• Supports live insertion and withdrawal via IOFF circuitry that prevents backflow current when powered down
• Provides symmetrical output impedance with strong drive capability for reliable signal transmission

Applications

• Memory address drivers in low-voltage computing systems
• Clock distribution networks requiring high-speed buffering
• Bus-oriented transmitter and receiver applications in mixed-signal environments

Procurement Notes

Verify the specific suffix SJ corresponds to the 20-SOP package configuration before procurement. Confirm RoHS compliance and lead-free status as these attributes are standard for this series but must match project requirements. Ensure the ordering code matches the exact manufacturer part number to avoid functional discrepancies in voltage tolerance or package dimensions.

Selection Notes

Select this component when designing systems requiring isolation between low-voltage logic cores and 5V peripheral buses. The wide input voltage tolerance simplifies level shifting without additional translation circuits. Consider the operating temperature range and static current specifications to ensure compatibility with strict power budget constraints in portable or battery-operated electronic devices.

Part Context

This device belongs to the 74LCX family of low-voltage CMOS logic products manufactured by onsemi. The LCX series is engineered to deliver AC/ACT speed performance at significantly lower power consumption levels. As an octal buffer, it consolidates eight independent channels into a single integrated circuit, reducing board space and simplifying layout for complex digital interfaces.

Replacement Considerations

Publicly confirmed substitute part numbers include SN74LVC244APWR from Texas Instruments and 74LCX244FT from Toshiba Semiconductor and Storage. Verify pinout compatibility and electrical parameter alignment before substituting.