74FST3251QS

Overview

The ON Semiconductor 74FST3251QS is an 8:1 multiplexer/demultiplexer bus switch. It operates between 4 and 5.5 Volts and is CMOS TTL compatible. The device exhibits extremely low R ON and adds nearly zero propagation delay. Typical R ON is less than 0.25 ohms, with a maximum delay through the switch of 0.25 ns. It adds no noise or ground bounce to the system.

Feature Summary

• High-performance 8:1 multiplexer/demultiplexer bus switch architecture
• Extremely low on-resistance for minimal signal loss
• Near-zero propagation delay for high-speed data routing
• Elimination of system noise and ground bounce during switching

Applications

• High-speed data bus switching
• Multiplexing and demultiplexing applications
• System interconnects requiring low latency

Procurement Notes

Verify the specific suffix QS indicates the SOIC-16 package variant when ordering. Confirm the manufacturer is ON Semiconductor. Ensure the part number matches the exact functional specifications required for your design. Check for any specific environmental or compliance markings if applicable to your region.

Selection Notes

Select this component for applications requiring fast switching speeds with minimal signal degradation. The low on-resistance and zero propagation delay make it suitable for high-frequency digital systems. Ensure the supply voltage range of 4 to 5.5 Volts aligns with your system's power rails.

Part Context

This device belongs to the 74FST logic family, designed for high-speed performance. It serves as a bus switch solution, replacing traditional logic gates for mux/demux functions. The technology combines CMOS compatibility with TTL input levels, facilitating integration into mixed-voltage systems.

Replacement Considerations

Consult official substitution guides for pin-compatible alternatives from the same manufacturer. Verify electrical parameters such as on-resistance and propagation delay match the original requirements before swapping components.