FST3257MTC

Overview

The FST3257MTC is a quad 2:1 multiplexer/demultiplexer bus switch manufactured by onsemi. It utilizes high-speed CMOS technology and maintains TTL compatibility for control inputs. The device features low on-resistance, enabling signal transmission between ports without adding propagation delay or generating excess ground bounce noise. It operates with a supply voltage range of 2.5 V to 3.6 V and supports surface-mount packaging.

Feature Summary

• Provides four independent bidirectional switches connecting A ports to selected B port outputs when enabled.
• Maintains high-impedance state at both ports when the output enable pin is deactivated.
• Ensures zero noise during conduction mode while minimizing power consumption.
• Supports direct connection to TTL-compatible logic systems.

Applications

• High-speed data routing in digital communication interfaces
• Bus switching applications requiring minimal signal distortion
• Portable equipment utilizing 3.3 V power supplies

Procurement Notes

Verify the specific suffix MTC against official datasheets to confirm the TSSOP-16 package configuration. Confirm operational voltage ranges align with system requirements. Check current lifecycle status as legacy components may face obsolescence. Ensure RoHS compliance documentation matches regional regulatory standards before procurement.

Selection Notes

Select this component for designs requiring low insertion loss and fast switching speeds within a 3.3 V domain. Compare propagation delays and on-resistance values against alternative bus switches. Verify that the package footprint matches existing PCB layouts. Consider availability and lead times given potential end-of-life status for older logic families.

Part Context

This part belongs to the FST (Fast Switching Technology) family from onsemi, designed for high-performance digital switching. It serves as an evolution of earlier 74FST series devices, offering improved speed and lower power consumption. The FST3257 specifically addresses needs for multi-channel signal selection in compact electronic systems.

Replacement Considerations

Check for direct cross-reference part numbers from onsemi or other manufacturers offering identical pinouts and electrical characteristics. Verify functional equivalence regarding voltage levels and switching speeds before substituting.