74FST3257DR2

Overview

The onsemi 74FST3257DR2 is a quad 2:1 multiplexer/demultiplexer bus switch designed for high-performance applications. It operates within a supply voltage range of 4.0 V to 5.5 V and supports an operating temperature range from -40°C to +85°C. The device features extremely low on-resistance (RON) with a typical value of 4 Ω at 4.5 V, ensuring minimal signal degradation. Propagation delay through the switch is less than 0.25 ns, contributing to nearly zero added latency in data paths.

Feature Summary

• Provides four independent 2:1 multiplexing or demultiplexing channels for efficient signal routing
• Exhibits extremely low on-resistance and negligible propagation delay for high-speed data integrity
• Ensures system stability by adding no noise or ground bounce during switching operations
• Features control inputs that are fully compatible with both TTL and CMOS logic levels

Applications

• High-speed data bus switching and routing in communication systems
• Multiplexing and demultiplexing functions in peripheral interfaces
• Signal path selection in digital processing circuits requiring low latency

Procurement Notes

Verify the specific ordering suffix 'R2' confirms the SOIC-16 tape and reel packaging configuration. Confirm the absence of the 'G' suffix indicates the package may not be explicitly designated as lead-free in this specific part number variant. Ensure compatibility with existing PCB footprints for the SOIC-16 case 751B outline before finalizing procurement orders.

Selection Notes

Select this component when a quad 2:1 mux/demux topology is required with FST logic speed characteristics. It is suitable for designs needing TTL/CMOS input compatibility and low power consumption. Consider the SOIC-16 package constraints and verify thermal management requirements for the specified operating temperature range.

Part Context

This device belongs to the 74FST logic family, characterized by Fast Switching Technology for high-speed operation. It serves as a bus switch solution, offering pin-for-pin compatibility with other industry-standard devices like the QS3257 and CBT3257. The component is manufactured by onsemi, formerly known as Semiconductor Components Industries, LLC.

Replacement Considerations

The datasheet notes pin-for-pin compatibility with the QS3257, FST3257, and CBT3257. Verify electrical specifications and package dimensions match exactly before substituting these equivalent parts.