FST3257MX

Overview

The FST3257MX is a quad 2-to-1 multiplexer/demultiplexer bus switch manufactured by onsemi. It utilizes high-speed CMOS technology with TTL-compatible control inputs. The device operates within a supply voltage range of 2.7 V to 3.6 V and supports surface-mount installation in an SOIC-16 package. Key electrical characteristics include a propagation delay of 6.5 ns at 2.7 V and 6 ns at 3.3 V, with a maximum power dissipation of 180 mW. It functions across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Provides four independent bidirectional switches for data routing
• Features low on-resistance to minimize signal distortion
• Ensures zero noise during conduction mode
• Maintains high impedance state when disabled

Applications

• High-speed data bus switching applications
• Portable equipment requiring low power consumption
• Consumer electronics utilizing CMOS logic interfaces

Procurement Notes

Verify component authenticity through authorized distribution channels due to the prevalence of counterfeit electronic components. Confirm that the received parts match the specific NC7 or FST series markings and packaging details provided in official datasheets. Ensure compliance with RoHS directives and check for any obsolescence notices from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component for designs requiring precise signal routing between multiple sources with minimal latency. The low on-resistance ensures signal integrity is maintained across the switch. Consider the operating voltage range and package constraints when integrating into compact circuit boards. Verify thermal management requirements based on the specified power dissipation limits under expected load conditions.

Part Context

This part belongs to the FST series of high-speed bus switches designed for efficient data path management. It serves as a critical interface element in systems where signal directionality must be controlled dynamically. The device complements other logic ICs by providing reliable switching capabilities without introducing significant propagation delays or ground bounce issues.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.