74LCX543MSAX

Overview

The Fairchild Semiconductor 74LCX543MSAX is an octal bus transceiver featuring non-inverting logic and three-state outputs. It operates within a voltage range of 2V to 3.6V and supports LVTTL or TTL input levels with LVCMOS output levels. The device provides 24mA drive current for both high and low states, ensuring robust signal integrity across digital interfaces. Packaged in a 24-SSOP surface-mount configuration, it functions as a single-element, eight-bit transceiver suitable for bidirectional data transfer applications.

Feature Summary

• Octal bus transceiver architecture supporting eight-bit bidirectional data transfer
• Three-state outputs enabling efficient bus line management and isolation
• Compatible with LVTTL and TTL input logic levels for broad interface integration

Applications

• Bidirectional data bus drivers in embedded systems
• Memory interface buffering for low-voltage logic families
• General-purpose I/O expansion modules requiring level translation

Procurement Notes

Verify component authenticity through authorized distributors due to discontinued status. Confirm package marking matches the 24-SSOP specification. Check datasheet revisions for electrical parameter updates. Ensure supply chain sources provide traceability documentation. Validate compatibility with existing board designs before procurement.

Selection Notes

Select this component for applications requiring octal data direction control between 2V and 3.6V logic domains. Consider the 24-SSOP footprint for PCB layout constraints. Evaluate the 24mA drive capability against load requirements. Verify that input voltage levels align with source logic standards. Assess thermal performance within the specified operating temperature range.

Part Context

This part belongs to the 74LCX series of low-voltage CMOS logic devices. It serves as a successor to older 5V tolerant transceivers, offering improved power efficiency. The device integrates buffer functionality with direction control, commonly used in portable electronics and industrial control systems where space and power are critical design factors.

Replacement Considerations

The 74LCX543MTC is a documented substitute from onsemi. Verify pinout compatibility and electrical specifications before substitution. Ensure the alternative package type fits the existing footprint.