74FST3253Q

Overview

The IDT 74FST3253Q is a high-speed multiplexer and demultiplexer bus switch manufactured by Integrated Device Technology Inc. It integrates two independent 4-to-1 multiplexers within a single package, providing flexible signal routing capabilities for digital systems. The device operates with a supply voltage range of 2.3V to 3.6V and features three-state outputs to prevent bus contention during inactive periods. Packaged in a 16-pin QSOP format, it supports low-power CMOS technology while maintaining fast switching speeds suitable for data-intensive applications.

Feature Summary

• Integrates two independent 4:1 multiplexer/demultiplexer channels for versatile signal path management
• Provides three-state outputs to isolate selected lines from the bus when disabled
• Utilizes low-power CMOS technology to reduce overall system energy consumption
• Supports operation across a standard 2.3V to 3.6V supply voltage range

Applications

• Data routing in computer and telecommunications equipment
• Signal selection in consumer electronics and industrial control systems
• Bus switching in embedded systems requiring multiple input sources

Procurement Notes

Verify the specific manufacturer designation, as IDT products may be sourced through various distributors or legacy partners. Confirm the package type matches the required 16-QSOP footprint for your PCB layout. Ensure compliance with RoHS directives if applicable to your manufacturing standards. Cross-reference the part number suffixes carefully, as they may indicate temperature ranges or packaging variations that affect compatibility.

Selection Notes

Select this component when designing circuits that require dual independent signal paths with 4:1 selection logic. It is appropriate for systems operating between 2.3V and 3.6V where low power consumption is critical. Consider the 16-QSOP package dimensions against your available board space. Evaluate the propagation delay specifications against your maximum clock frequencies to ensure signal integrity is maintained under load conditions.

Part Context

This component belongs to the 74FST series of high-speed logic devices, designed for performance-critical applications. It serves as a functional equivalent to other industry-standard multiplexer ICs but offers specific integration benefits from Integrated Device Technology. The device is part of a broader family of bus switches and mux/demux solutions used in modern digital infrastructure.

Replacement Considerations

Check for direct cross-references from manufacturers like Fairchild or Rochester Electronics, which may produce compatible variants such as the FSTU3253QSC. Verify pinout compatibility and electrical characteristics before substitution. Ensure any replacement maintains the same 16-pin QSOP form factor and voltage operating range.