74LCX2244SJ

Overview

The onsemi 74LCX2244SJ is an octal buffer and line driver featuring non-inverting logic with three-state outputs. It operates within a supply voltage range of 2.3V to 3.6V, utilizing advanced CMOS technology for high-speed performance and low power dissipation. The device incorporates 26Ω series resistors in the output paths to mitigate overshoot and undershoot. It supports live insertion and withdrawal capabilities while maintaining compatibility with 5V signal environments through tolerant inputs and outputs.

Feature Summary

• Features integrated 26Ω series resistors in the output lines to reduce signal overshoot and undershoot.
• Provides five-volt tolerant inputs and outputs, enabling safe interfacing between low-voltage and 5V signal domains.
• Supports live insertion and withdrawal operations to facilitate system maintenance without power cycling.

Applications

• Memory address drivers
• Clock drivers
• Bus-oriented transmitter/receiver circuits

Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm package type matches the SOP-20 designation. Ensure compliance with RoHS directives if required by project standards. Review absolute maximum ratings to prevent operational damage during procurement validation.

Selection Notes

Select this component when designing systems requiring interface between 2.5V or 3.3V logic and 5V environments. The inclusion of series resistors makes it suitable for applications demanding controlled signal integrity. Consider the three-state output capability for bus-sharing architectures where multiple drivers connect to common lines.

Part Context

This part belongs to the LCX family of low-voltage CMOS logic devices manufactured by onsemi (formerly Fairchild Semiconductor). The LCX series is engineered for low-power applications operating at reduced voltages compared to standard CMOS logic families, offering improved noise immunity and speed characteristics.

Replacement Considerations

Direct substitutes may include other octal buffers from the same logic family. Verify pinout compatibility and electrical parameters such as propagation delay and output drive current before substitution.

FAQ

What is the function of the internal series resistors?

The 26Ω series resistors are integrated into the output paths to help reduce output overshoot and undershoot, improving signal integrity.

Can this device interface with 5V signals?

Yes, the 74LCX2244SJ features five-volt tolerant inputs and outputs, allowing it to safely interface with 5V signal environments despite operating at lower supply voltages.