FSTU3257MTC

Overview

The FSTU3257MTC is a dual 4:1 multiplexer/demultiplexer bus switch manufactured by Fairchild Semiconductor. It utilizes high-speed CMOS technology to provide TTL-compatible switching with low on-resistance, minimizing propagation delay and ground bounce noise. The device features separate output enable (OE) inputs for each multiplexer channel, allowing independent control of the two ports. When OE is LOW, the selected B port connects to the A port via S0 and S1 address lines; when HIGH, the switch opens to a high-impedance state.

Feature Summary

• Dual 4:1 Multiplexer/Demultiplexer Bus Switch architecture
• High-speed CMOS technology with minimal propagation delay
• Low on-resistance connection between ports
• Separate Output Enable (OE) inputs for independent channel control

Applications

• High-speed data routing in digital systems
• Bus switching applications requiring low latency
• Multiplexing signal paths in communication interfaces

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity and pin alignment against the TSSOP-24 specification. Ensure compliance with RoHS directives if required for your assembly process. Check for obsolescence notices as Fairchild products may have transitioned to ON Semiconductor nomenclature.

Selection Notes

Select this component for designs requiring dual independent 4-to-1 signal routing with low insertion loss. Verify that the supply voltage range matches your system requirements. Ensure the TSSOP-24 package fits your PCB footprint constraints. Consider the TTL compatibility of control inputs for seamless integration with standard logic families.

Part Context

This part belongs to the Fairchild Switch family, designed for efficient signal routing in electronic circuits. It serves as a critical interface component for managing multiple data sources or destinations within a single system trace, optimizing board space and signal integrity compared to discrete switching solutions.

Replacement Considerations

Equivalent parts include the FST3253MTC and FST3257MTC from ON Semiconductor. Verify pinout compatibility and electrical specifications before substitution.