74LCX16543MTD

Overview

The Fairchild Semiconductor 74LCX16543MTD is a low voltage 16-bit registered transceiver featuring two sets of D-type registers for temporary data storage in either direction. It provides 5V tolerant inputs and outputs, supporting VCC specifications from 2.3V to 3.6V. The device utilizes advanced CMOS technology to achieve high-speed operation with a maximum propagation delay of 5.2 ns at VCC = 3.3V while maintaining low power dissipation. It offers ±24 mA output drive capability at VCC = 3.0V and includes patented noise/EMI reduction circuits.

Feature Summary

• Contains sixteen non-inverting transceivers with dual D-type register sets for bidirectional data storage
• Features 5V tolerant inputs and outputs for interfacing low voltage systems with 5V environments
• Incorporates patented noise and electromagnetic interference (EMI) reduction circuitry

Applications

• Interfacing low voltage (2.5V or 3.3V) applications with 5V signal environments
• General purpose bus transceiver designs requiring registered data storage
• Systems supporting hot insertion and removal operations

Procurement Notes

Verify the manufacturer designation, as Fairchild Semiconductor's logic division is now part of onsemi. Confirm the specific suffix 'MTD' corresponds to the TSSOP-56 package and tape-and-reel orientation required for your assembly process. Ensure the component meets current RoHS compliance standards by checking the latest datasheet revision. Cross-reference the part number with authorized distributors to confirm availability and authenticity before procurement.

Selection Notes

Select this component when designing interfaces between 3.3V or 2.5V logic domains and 5V tolerant buses. The integrated D-type registers make it suitable for applications requiring data latching during transmission. Consider the 5.2 ns propagation delay and ±24 mA drive strength for timing and load requirements. Ensure the system supports the specified 2.3V to 3.6V supply voltage range for optimal performance.

Part Context

This component belongs to the LCX series of low-voltage CMOS logic devices. The LCX family is designed to bridge the gap between older 5V TTL-compatible logic and modern low-voltage systems. The 16543 variant specifically addresses the need for wide-width registered transceivers with high noise immunity and EMI suppression capabilities.

Replacement Considerations

Check for equivalents from onsemi, which acquired Fairchild's semiconductor business. Verify pin compatibility and electrical characteristics against other 16-bit registered transceivers in the LCX or LVC families if sourcing from alternative manufacturers.