74FST3251DTR2

Overview

The onsemi 74FST3251DTR2 is an 8:1 multiplexer/demultiplexer bus switch manufactured in a TSSOP-16 package. It operates within a supply voltage range of 4.0 V to 5.5 V and supports data rates compatible with CMOS and TTL logic standards. The device features extremely low on-resistance, typically less than 7 ohms at 4.5 V, and exhibits nearly zero propagation delay through the switch path. Control inputs are fully compatible with TTL and CMOS logic levels.

Feature Summary

• Provides high-performance 8-to-1 multiplexing or demultiplexing functionality for bus switching applications
• Features extremely low on-resistance and negligible propagation delay to maintain signal integrity
• Control inputs are designed for direct compatibility with both TTL and CMOS logic families
• Operates without introducing circuit bounce or ground noise into the system

Applications

• High-speed data routing in digital communication systems
• Bus switching in computer peripheral interfaces
• Signal selection in embedded control architectures

Procurement Notes

Verify that the component matches the specific DTR2 suffix to ensure it is supplied in a tape and reel format within the TSSOP-16 package. Confirm the ordering number corresponds to the Rev. 3 datasheet specifications. Ensure the procurement channel provides documentation confirming the inherent lead-free status of this specific package type as stated by the manufacturer.

Selection Notes

Select this component when designing circuits requiring an 8-channel bus switch with minimal signal distortion. It is suitable for applications operating between 4.0 V and 5.5 V where TTL/CMOS interface compatibility is required. Consider the TSSOP-16 package constraints and thermal characteristics if space or heat dissipation is a limiting factor in the design.

Part Context

This part belongs to the 74FST logic family, which is optimized for high-speed operation. The 74FST3251 variant specifically addresses the need for multi-channel signal routing. It is distinct from standard logic gates by providing configurable bus connectivity rather than simple Boolean operations.

Replacement Considerations

Direct replacements include the 74FST3251DR2 (SOIC-16) and 74FST3251QSR (QSOP-16). These variants share identical electrical characteristics but differ in physical package dimensions and mounting style. Verify pinout compatibility before substituting.