74ABT543CMTCX

Buffers, Drivers, Receivers, Transceivers Overview

The Fairchild Semiconductor 74ABT543CMTCX is an octal registered transceiver featuring three-state outputs, designed for bus-oriented applications. It belongs to the ABT logic series and utilizes BiCMOS technology. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports TTL input and output levels. It provides high current drive capabilities with a low-level output current of 64 mA and a high-level output current of -32 mA. The component exhibits a propagation delay of 5.9 ns and functions reliably across an operating temperature range from -40°C to +85°C. It is housed in a surface-mount SSOP-24 package.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal registered transceiver architecture with three-state outputs for efficient bus management
• High current sinking capability of 64 mA on both ports to support heavy loads
• BiCMOS construction ensuring fast switching speeds and low power consumption
• Glitch-free operation during power-up and power-down cycles to prevent bus contention

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented data transmission systems requiring latched storage
• High-speed digital signal routing in industrial control environments
• Memory interface circuits utilizing registered data buffers

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific manufacturer designation as the requested model may be associated with Fairchild or its successor entities. Confirm the exact package type and pinout compatibility with existing designs. Check for RoHS compliance status and ensure the component meets current environmental regulations. Validate availability through authorized distributors given potential lifecycle changes in legacy logic families.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal registered buffer with three-state control is required for 5V logic systems. Ensure the design accommodates the SSOP-24 package dimensions and thermal requirements. Verify that the 5.9 ns propagation delay meets the system timing constraints. Consider the 64 mA sink current capability for driving multiple loads or long traces without external buffering.

Buffers, Drivers, Receivers, Transceivers Part Context

This part is part of the ABT logic family, which combines the speed of Schottky TTL with the low power characteristics of CMOS. The 543 variant specifically adds registration (latching) to the transceiver function, allowing data to be captured and held while the bus remains active. This distinguishes it from non-registered transceivers like the 245 series.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74ABT543ADBR by Texas Instruments offers equivalent functionality and specifications. CY74FCT543TSOCT by Cypress/TI provides similar performance within the FCT family.