74LCXR2245WMX

Overview

The Fairchild Semiconductor 74LCXR2245WMX is a low-voltage bidirectional transceiver featuring 5V tolerant inputs and outputs. It integrates 26 Ohm series resistors on both A and B ports to control signal line impedance. The device operates within a supply voltage range of 1.4V to 3.6V, providing high and low output currents of 12mA each. It utilizes a 20-pin SOIC package.

Feature Summary

• Integrates 26 Ohm series resistors on both A and B ports for signal integrity management
• Provides 5V tolerant inputs and outputs for mixed-voltage system interfacing
• Supports bidirectional data transfer with non-inverting logic functionality

Applications

• Bus-oriented applications requiring level translation between low-voltage and 5V domains
• Embedded systems utilizing mixed-voltage microcontrollers
• High-speed data transmission lines requiring controlled impedance

Procurement Notes

Verify the specific manufacturer designation, as this component may be listed under ON Semiconductor or AMI Semiconductor following corporate restructuring. Confirm the presence of integrated series resistors and the 20-pin SOIC package format against your schematic requirements. Ensure the 1.4V to 3.6V operating range aligns with your target supply voltage.

Selection Notes

Select this component when bidirectional level shifting between 1.8V/2.5V/3.3V logic and 5V tolerant interfaces is required. The integrated 26 Ohm resistors make it suitable for applications needing inherent impedance matching without external components. It is appropriate for bus architectures where non-inverting data flow and 12mA drive capability are necessary.

Part Context

This part belongs to the LCX family of low-voltage CMOS logic devices. It serves as a specialized variant of standard bidirectional transceivers by incorporating built-in series resistors. This integration simplifies PCB layout for high-speed buses while maintaining compatibility with standard 5V tolerant logic levels.

Replacement Considerations

Check for equivalents from ON Semiconductor, which acquired Fairchild's logic business. Verify that substitute parts maintain the 26 Ohm resistor integration and 5V tolerance specifications.