FST3257QSCX

Signal Switches, Multiplexers, Decoders Overview

The onsemi FST3257QSCX is a Quad 2:1 Multiplexer/Demultiplexer Bus Switch belonging to the 74FST logic family. It operates within a supply voltage range of 4 V to 5.5 V and features a typical on-resistance (RON) of 4 Ω. The device ensures signal integrity with a maximum propagation delay of less than 0.25 ns and nearly zero standby current. Designed for surface-mount applications, it utilizes a 16-pin QSOP package and supports operation temperatures from -40°C to +85°C.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides four independent 2:1 multiplexing or demultiplexing channels for high-speed data routing.
• Delivers low on-resistance and minimal propagation delay for efficient signal transmission.
• Maintains nearly zero standby current consumption during inactive states.

Signal Switches, Multiplexers, Decoders Applications

• High-speed bus switching in computer systems
• Data routing in telecommunications equipment
• Signal multiplexing in industrial control interfaces

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify component authenticity through authorized distributors due to potential counterfeit risks. Confirm package integrity and pin alignment upon receipt. Ensure storage conditions comply with moisture sensitivity levels specified in the datasheet. Validate electrical parameters against official test limits before integration into production circuits.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when designing systems requiring quad 2:1 mux/demux functionality with FST logic speed characteristics. Ensure the operating voltage aligns with the 4 V to 5.5 V range. Consider the QSOP package constraints for PCB layout and thermal management requirements relative to similar FST series alternatives.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74FST3257 series, which includes variants such as the MNTWG and QSCX. These devices share core logical functions but differ in packaging and specific manufacturing revisions. The FST3257QSCX specifically denotes the QSOP package configuration within this multiplexer family.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The FST3257MNTWG serves as a functional equivalent within the same series, offering identical logical performance in a QFN-16 package. Verify pin compatibility and thermal dissipation differences when substituting between QSOP and QFN form factors.