74LCX244MSA

Overview

The onsemi 74LCX244MSA is a low-voltage CMOS octal buffer and line driver featuring non-inverting logic with three-state outputs. It operates within a supply voltage range of 1.65V to 3.6V, ensuring compatibility with modern low-power systems. The device provides high-impedance TTL-compatible inputs and outputs capable of interfacing directly with 5V signal environments without level shifting. Designed for high-speed performance, it maintains low power dissipation while delivering robust drive capabilities suitable for memory address driving and bus-oriented transmitter/receiver applications.

Feature Summary

• Provides eight non-inverting buffers with three-state outputs for flexible bus management
• Features 5V tolerant inputs and outputs to interface safely with legacy 5V logic systems
• Supports live insertion and withdrawal to facilitate hot-swapping operations
• Includes power-down protection to maintain high-impedance states when VCC is off

Applications

• Memory address drivers in embedded systems
• Bus-oriented transmitter and receiver circuits
• Clock distribution networks requiring low skew
• I/O port expansion for microcontroller interfaces

Procurement Notes

Verify the specific suffix 'MSA' against the manufacturer's current datasheet to confirm package type and tape-and-reel specifications. Ensure the component meets RoHS compliance requirements if applicable to your assembly process. Cross-reference the pinout diagram with your PCB footprint to avoid orientation errors during placement. Confirm that the operating temperature range aligns with your system's environmental constraints before finalizing procurement.

Selection Notes

Select this component when designing systems that require bridging low-voltage logic with 5V tolerant buses. It is ideal for applications needing high drive strength combined with low static power consumption. Consider its propagation delay characteristics relative to your clock speeds. Evaluate the package options available for your manufacturing capabilities, as surface-mount variants offer space efficiency for dense layouts.

Part Context

This part belongs to the 74LCX family of low-voltage CMOS logic devices from onsemi. The LCX series is engineered to provide AC/ACT speed performance at significantly lower power levels. It serves as a standard solution for level translation and buffering in mixed-voltage digital designs, replacing older HC/HCT families where power savings are critical.

Replacement Considerations

Direct substitutes include the SN74LVC244ADBR from Texas Instruments and the 74LCX244MTCX from Fairchild Semiconductor. Verify pin compatibility and electrical parameters such as output drive current and propagation delay before swapping components in existing designs.