FST3257MTCX

Overview

The FST3257MTCX is a quad 2:1 multiplexer/demultiplexer bus switch manufactured by onsemi. It features low on-resistance to minimize propagation delay and ground bounce noise during signal switching. The device operates with TTL-compatible control inputs and supports high-speed data transmission. It includes an output enable pin that controls the connection state between ports, allowing for flexible bus management in digital systems.

Feature Summary

• Provides four independent 2:1 multiplexer/demultiplexer channels
• Low on-resistance ensures minimal signal degradation
• TTL-compatible control input levels
• Output enable pin manages port connectivity

Applications

• High-speed data bus switching
• Signal routing in digital communication systems
• Multiplexing applications requiring low latency

Procurement Notes

Verify the exact package marking and date code against the manufacturer's latest datasheet before procurement. Ensure the supply chain source provides valid RoHS compliance documentation. Confirm that the specific suffix matches the required tape and reel quantity if automated assembly is planned. Cross-reference the part number with the official onsemi ordering information to avoid counterfeit components.

Selection Notes

Select this component when designing circuits requiring multiple bidirectional bus switches with low insertion loss. Consider the operating voltage range and input logic compatibility with the controlling microcontroller. Evaluate the parasitic capacitance and leakage current specifications against the system's signal integrity requirements. Ensure the thermal performance of the TSSOP-14 package suits the application's power dissipation limits.

Part Context

This device belongs to the FST (Fast Switching Technology) family of bus switches from onsemi. These components are designed to replace mechanical relays and older transistor-based switches in modern digital designs. The series offers improved speed and lower power consumption compared to standard CMOS switches, making them suitable for high-frequency data paths.