74LCX543MTCX

Overview

The onsemi 74LCX543MTCX is an octal registered bus transceiver belonging to the 74LCX logic family. It operates within a supply voltage range of 2 V to 3.6 V and features three-state outputs. The device provides 8-bit data transmission with independent direction control and output enable functions. It utilizes a TSSOP-24 surface-mount package and supports LVTTL or TTL input levels while driving LVCMOS outputs. The component is rated for industrial operating temperatures from -40°C to +85°C.

Feature Summary

• Octal registered bus transceiver architecture providing 8-bit data path capability
• Independent control for data direction and output enable states
• Compatible with LVTTL and TTL input logic levels for mixed-voltage interfacing
• Three-state outputs designed to minimize bus contention in parallel architectures

Applications

• High-performance memory mapping systems requiring registered data buffering
• Clocking circuits utilizing registered bus structures for timing alignment
• Control signal routing in embedded systems with mixed voltage domains

Procurement Notes

Verify the specific suffix 'X' against the manufacturer's official datasheet to confirm packaging details, as suffixes often denote reel-based tape-and-reel configurations distinct from tube packaging. Ensure the revision level matches current production status, as older variants may have different mechanical dimensions or electrical characteristics. Cross-reference RoHS compliance documentation directly with the supplier to confirm material composition standards for the specific manufacturing batch.

Selection Notes

Select this component when an octal width with internal registration is required for bus isolation. The 74LCX series offers low static power consumption suitable for battery-operated applications. Verify that the system voltage aligns with the 2V to 3.6V operational range. Consider the TSSOP-24 package constraints regarding thermal dissipation and PCB space availability compared to wider SOIC alternatives.

Part Context

This part belongs to the 74LCX family of low-voltage CMOS logic devices manufactured by onsemi. The LCX series is engineered for high-speed operation with reduced power consumption compared to earlier LVC or LVX generations. The 543 designation specifically identifies the octal registered transceiver function within the broader logic IC portfolio, distinguishing it from unregistered transceivers or buffers.

Replacement Considerations

The PI74LCX543SX from Diodes Incorporated (Pericom) serves as a functional substitute with identical logical operations and pinout compatibility. Both devices offer octal registered bus transceiver functionality within similar voltage ranges. Verify package tolerance differences between TSSOP and SOIC variants during physical integration.