FST3253MTCX

Overview

The FST3253MTCX is a dual 4:1 high-speed CMOS TTL-compatible multiplexer/demultiplexer bus switch manufactured by onsemi. It integrates two independent switches, each capable of connecting one of four inputs to a single output based on select lines. The device features low on-resistance and minimal propagation delay, ensuring signal integrity without adding ground bounce noise. It operates with control inputs compatible with TTL levels and includes an output enable function to manage high-impedance states.

Feature Summary

• Dual 4:1 multiplexer/demultiplexer architecture for flexible signal routing
• TTL-compatible control inputs for direct interface with logic systems
• Low on-resistance switch connection minimizing signal degradation
• Output enable pin for controlling high-impedance states

Applications

• High-speed data bus switching in computing systems
• Signal routing in telecommunications equipment
• Multiplexing applications in industrial control systems

Procurement Notes

Verify the manufacturer marking and date code against official onsemi documentation to ensure authenticity. Confirm the package type matches the specified TSSOP-20 configuration. Check for any specific ordering suffixes that may indicate tape-and-reel packaging or environmental compliance variations. Ensure the component meets the required operating temperature range for the intended application environment.

Selection Notes

Select this component when a dual 4:1 mux/demux function is required with TTL compatibility. Consider its low on-resistance for maintaining signal quality in high-speed digital interfaces. Evaluate the package size constraints against the available board space. Verify power supply requirements and voltage levels match the system design specifications.

Part Context

This part belongs to the FST series of high-speed CMOS bus switches from onsemi. It is designed for applications requiring fast switching speeds and low power consumption. The series is commonly used in digital systems where signal routing and isolation are critical. It serves as a replacement for legacy discrete switching solutions.

Replacement Considerations

Check for cross-reference parts such as the FST3253MTC from Fairchild Semiconductor. Verify pinout compatibility and electrical characteristics before substitution. Ensure the alternative part supports the same voltage levels and package dimensions.