74LCX2244MSAX

Overview

The onsemi 74LCX2244MSAX is a low-voltage CMOS octal buffer and line driver featuring 3-state outputs. It integrates 26Ω series resistors in the output path to reduce overshoot and undershoot. The device supports 5V tolerant inputs and outputs, allowing operation with VCC ranging from 2.0V to 3.6V while interfacing with 5V signal environments. Propagation delay is specified at a maximum of 7.5ns at VCC = 3.3V. It operates within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates 26Ω series resistors in the output path to minimize signal overshoot and undershoot.
• Provides 5V tolerance for both inputs and outputs, enabling safe interfacing between low-voltage logic and 5V systems.
• Supports live insertion and withdrawal operations when configured correctly.

Applications

• Memory address drivers
• Clock drivers
• Bus-oriented transmitters and receivers

Procurement Notes

Verify that the specific MSAX suffix corresponds to the SSOP-20 package variant as documented in the datasheet ordering codes. Confirm RoHS compliance status through official manufacturer channels prior to integration. Ensure design accounts for the required pull-up resistor on OE pins to maintain high-impedance states during power transitions.

Selection Notes

Select this component for applications requiring robust signal integrity in low-voltage environments due to the integrated series resistors. It is suitable for designs needing direct interface with 5V peripherals without level shifting. Consider the 20-lead SSOP package constraints regarding board space and thermal dissipation requirements.

Part Context

This part belongs to the LCX family of low-voltage CMOS logic devices manufactured by Fairchild Semiconductor (now onsemi). The LCX series is designed for high-speed operation with low power consumption, specifically targeting portable and battery-powered applications where voltage levels are typically 2.5V or 3.3V.

Replacement Considerations

Direct substitutes include other octal buffers with 5V tolerance and similar propagation delays. Verify pin compatibility and electrical characteristics against alternatives such as the MC74LCX244A or equivalent parts from other manufacturers offering 5V tolerant octal buffers.