74LCXR2245MSAX

Overview

The 74LCXR2245MSAX is an octal bus transceiver from the LCXH series, fabricated using advanced CMOS technology. It features non-inverting bidirectional data flow controlled by a Direction (DIR) pin and an Output Enable (OE) pin. The device operates within a voltage range of 2.0V to 3.6V and includes active bus-hold circuitry on data inputs to prevent floating states. It provides three-state outputs and incorporates 26-ohm series resistors in the B port to reduce signal overshoot and undershoot during switching.

Feature Summary

• Active bus-hold circuitry eliminates the need for external pull-up resistors on unused or floating data inputs.
• Integrated 26-ohm series resistors in the B port outputs help minimize output overshoot and undershoot.
• CMOS construction ensures low power dissipation while supporting high-speed operation in low-voltage systems.

Applications

• Bus-oriented applications requiring bidirectional data transmission
• Low-voltage (2.5V and 3.3V) system interfacing
• Memory and microcontroller data bus connections

Procurement Notes

Verify the specific suffix 'MSAX' against official manufacturer documentation to confirm tape-and-reel packaging and lead-free status. Ensure compatibility with the LCXH series specifications regarding voltage levels and electrical characteristics before integration into designs.

Selection Notes

Select this component when designing systems that require bidirectional data transfer between 2.5V and 3.3V logic domains. The integrated bus-hold feature simplifies design by removing external components for floating inputs, while the series resistors aid in signal integrity for high-speed buses.

Part Context

This part belongs to the ON Semiconductor LCXH family of low-voltage CMOS logic devices. The LCXH series is characterized by its ability to operate at lower voltages than standard LVC parts while maintaining robust performance. The '2245' designation indicates an octal transceiver with specific B-port series resistance features distinct from the standard 245 variant.

Replacement Considerations

Direct substitutes include other LCXH2245 variants such as the 74LCXH2245MTCX or 74LCXH2245SJ, provided they match the TSSOP-20 or SOIC-20 package requirements. Verify that replacement parts retain the 26-ohm series resistor specification in the B port if signal integrity mitigation is required.