FSTU3253QSCX

Overview

The FSTU3253QSCX 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 output characteristics. The device operates within an extended temperature range of -40 °C to +85 °C. It is housed in a 16-lead SSOP package, specifically identified as PDSO16 or MO-137, with a physical length of 4.9 mm. The component features three-state outputs and accepts two line inputs to drive eight line outputs.

Feature Summary

• Dual 4:1 Multiplexer/Demultiplexer Bus Switch functionality
• CMOS logic technology with true output polarity
• Three-state output capability for bus isolation

Applications

• Data routing in digital systems
• Bus switching applications requiring signal direction control
• Multiplexing and demultiplexing tasks in electronic circuits

Procurement Notes

Verify the specific manufacturer source, as the part number appears under both Fairchild Semiconductor and Rochester Electronics listings. Confirm that the QSOP-16 or SSOP package designation matches the required footprint. Ensure the operating temperature range meets the environmental specifications of the target application before finalizing procurement.

Selection Notes

Select this component when a dual 4:1 mux/demux configuration is required within a compact 16-pin surface-mount package. The CMOS construction supports standard logic levels, while the extended temperature rating allows for operation in industrial environments. Verify pin compatibility if replacing existing designs.

Part Context

This component is part of the 3253 series of multiplexer and demultiplexer devices. It shares functional similarities with other bus switches but is distinct in its dual 4:1 architecture. The QSCX suffix typically denotes a tape-and-reel packaging variant of the standard QSC part.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.