74LCXR2245WM

Overview

The Fairchild Semiconductor 74LCXR2245WM is a low-voltage bidirectional transceiver featuring eight non-inverting buffers with three-state outputs. It operates within a voltage range of 2.3V to 3.6V and provides 5V tolerant inputs and outputs, enabling direct interfacing with 5V signal environments. The device utilizes a 20-lead Thin Shrink Small Outline Package (TSSOP). Key electrical characteristics include a maximum propagation delay of 7.0 ns at 3.3V and a maximum quiescent current of 10 µA. It supports live insertion and withdrawal while implementing patented noise and EMI reduction circuitry.

Feature Summary

• Provides bidirectional data transmission between low-voltage buses and 5V tolerant environments
• Features patented noise and EMI reduction circuitry for signal integrity
• Supports live insertion and withdrawal without damage
• Offers high latch-up performance exceeding 500 mA

Applications

• Bus-oriented applications requiring level translation
• Memory and flash memory interfaces
• High-density data acquisition systems

Procurement Notes

Verify the package type matches the required 20-lead TSSOP form factor. Confirm that the operating voltage range of 2.3V to 3.6V aligns with the system design. Ensure compatibility with 5V tolerant I/O requirements if interfacing with legacy 5V logic. Check for RoHS compliance status as indicated in official documentation.

Selection Notes

Select this component when bidirectional data transfer is needed between 2.5V/3.3V systems and 5V environments. It is suitable for applications requiring low power consumption and high noise immunity. Consider the 7.0 ns propagation delay for timing-critical designs. Ensure the 20-lead TSSOP package fits the PCB layout constraints.

Part Context

This part belongs to the 74LCX series of low-voltage CMOS logic devices. It serves as an octal bus transceiver designed for general-purpose digital applications. The device is manufactured by Fairchild Semiconductor, now part of ON Semiconductor. It is distinct from single-supply variants by its specific 5V tolerance capabilities.

Replacement Considerations

The 74LCX245WM is a similar single-supply transceiver but lacks explicit 5V tolerance documentation in some contexts. Verify pinout compatibility before substitution. Other equivalents may include parts from NXP or STMicroelectronics within the 74LCX family, provided they meet the 5V tolerant input/output specification.