74LCX16543MEAX

Overview

The Fairchild Semiconductor 74LCX16543MEAX is a low-voltage 16-bit register transceiver designed for 5V tolerant applications. It contains 16 non-inverting transceivers and two D-type registers to temporarily store data flowing in either direction. Each half-byte features independent control inputs that can be shorted together for full functionality. Fabricated with advanced CMOS technology, it supports 2.3V to 3.6V VCC specifications while maintaining high-speed operation and low power dissipation.

Feature Summary

• Provides 5V tolerance on both input and output pins, enabling safe interfacing between low-voltage logic and 5V signal environments.
• Integrates dual D-type registers within the transceiver structure to facilitate temporary data storage during bidirectional flow.
• Features independent control inputs for each half-byte, allowing flexible configuration of data direction and register states.

Applications

• Low-voltage (2.5V or 3.3V) systems requiring interface capability with 5V signal environments
• Bidirectional bus architectures utilizing registered transceivers
• Hot-swappable applications supported by powered-high impedance inputs and outputs

Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors. Confirm package integrity and pin alignment against the 56-SSOP specification. Review datasheets for updated RoHS compliance status and environmental classifications prior to integration into final assemblies.

Selection Notes

Select this component when designing mixed-voltage interfaces requiring registered bidirectional data transfer. Ensure supply voltage remains within the 2.3V to 3.6V range. Verify that the 5V tolerant I/O characteristics align with the system's external signal levels to prevent damage or logic errors.

Part Context

This device belongs to the LCX series of low-voltage CMOS logic components. The series is characterized by advanced fabrication techniques that deliver high-speed performance comparable to faster logic families while maintaining the low power consumption typical of CMOS technology. It serves as a bridge between modern low-voltage processors and legacy 5V peripherals.

Replacement Considerations

Public confirmed substitute part numbers include 74LVCH16543APAG from Renesas Electronics Corporation and SN74LVCH16543ADGGR from Texas Instruments. These alternatives offer similar functional capabilities for low-voltage 16-bit registered transceiver applications.