FSTU3257MTCX

Overview

The FSTU3257MTCX is a quad 2:1 high-speed CMOS TTL-compatible multiplexer/demultiplexer bus switch manufactured by Fairchild Semiconductor. It features four independent switches in a 16-TSSOP package. The device operates with a single supply voltage and provides standard output types. Key electrical characteristics include a propagation delay of 0.25 ns at 4 V to 5.5 V. It is designed for applications requiring low on-resistance switching capabilities within the specified operating temperature range.

Feature Summary

• Quad 2:1 multiplexer/demultiplexer architecture providing four independent signal paths
• High-speed CMOS technology ensuring fast switching performance
• TTL-compatible input levels for broad interface compatibility
• Low on-resistance switch design for efficient signal transmission

Applications

• High-speed data routing in digital systems
• Bus switching applications requiring low latency
• Signal path selection in communication interfaces
• Multiplexing tasks in consumer electronics

Procurement Notes

Verify the manufacturer part number against official Fairchild or ON Semiconductor documentation to confirm authenticity. Ensure the package type matches the required 16-TSSOP configuration. Check for specific ordering suffixes that may indicate tape-and-reel packaging versus bulk quantities, as these affect handling and storage requirements. Confirm compliance with current environmental standards such as RoHS before procurement.

Selection Notes

Select this component when a quad 2:1 mux/demux function is required with high-speed performance. The TTL compatibility makes it suitable for interfacing with legacy logic families. Consider the 16-TSSOP package constraints for PCB layout. Evaluate the propagation delay specifications against system timing requirements to ensure signal integrity is maintained during switching operations.

Part Context

This component belongs to the FST series of bus switches, which are optimized for high-speed data transfer applications. The FSTU3257 variant specifically offers four independent channels, distinguishing it from single-channel counterparts. It serves as a critical interconnect solution in modern electronic designs where signal routing flexibility and speed are paramount.

Replacement Considerations

Direct substitutes may include other quad 2:1 mux/demux devices from the same family or compatible logic families. Verify pinout compatibility and electrical parameters such as on-resistance and propagation delay. Ensure the replacement supports the same supply voltage range and package dimensions to maintain board compatibility.