FSTU3253MTCX

Overview

The FSTU3253MTCX is a dual 4:1 multiplexer/demultiplexer bus switch manufactured by Fairchild Semiconductor. It belongs to the 3253 series and utilizes CMOS technology with true outputs. The device is housed in a 16-pin QSOP package, specifically identified as PDSO16 with dimensions of 0.150 inches (MO-137). It operates within a temperature range of -40 °C to 85 °C.

Feature Summary

• Dual 4:1 multiplexer and demultiplexer functionality
• High-speed CMOS construction for low power consumption
• TTL-compatible control inputs

Applications

• Bus switching applications requiring signal routing
• Multiplexing data lines in digital systems
• Demultiplexing signals to multiple destinations

Procurement Notes

Verify the specific manufacturer source, as documentation indicates availability from both Fairchild Semiconductor and Rochester Electronics. Confirm the package designation matches the QSOP-16 or PDSO16 specification. Ensure the component meets the required operating temperature range of -40 °C to 85 °C for your application environment.

Selection Notes

Select this component when a dual 4:1 switching configuration is required. The CMOS technology offers low current consumption suitable for battery-operated devices. The TTL-compatible control simplifies interface design with standard logic families. Verify pinout compatibility if replacing existing designs.

Part Context

This part is part of the 3253 series of bus switches. It shares functional similarities with the FST3253 but may differ in packaging or specific manufacturing lot details. The MTCX suffix typically denotes the tape and reel packaging format for surface mount assembly.

Replacement Considerations

The FST3253MX is a confirmed substitute part number listed in public records. Other variants such as FST3253MTC are also documented as related components within the same series.