74FST3257QSR

Overview

The onsemi 74FST3257QSR is a quad 2:1 multiplexer/demultiplexer bus switch manufactured by Semiconductor Components Industries, LLC. It operates within a supply voltage range of 4.0 to 5.5 volts and supports an operating free-air temperature from -40°C to +85°C. The device features extremely low on-resistance (RON) and nearly zero propagation delay, adding no noise or ground bounce to the system. Control inputs are compatible with both TTL and CMOS logic levels.

Feature Summary

• Quad 2:1 Multiplexer/Demultiplexer Bus Switch
• Extremely Low On-Resistance (RON)
• Nearly Zero Propagation Delay
• TTL/CMOS Compatible Control Inputs

Applications

• High-performance data routing
• Bus switching applications
• Multiplexing signal paths

Procurement Notes

Verify the specific suffix 'QS' corresponds to the QSOP-16 package configuration before procurement. Confirm that the component meets RoHS compliance requirements if applicable to your manufacturing standards. Ensure compatibility with existing PCB footprints designed for the QSOP-16 outline. Check for any end-of-life notices or alternative sourcing options given the product's publication date.

Selection Notes

Select this component when a quad 2:1 mux/demux function is required with minimal signal distortion. It is suitable for systems needing high-speed switching with negligible propagation delay. Consider the QSOP-16 package constraints regarding board space and thermal dissipation. Verify that the 4V to 5.5V operating range aligns with the system's power supply architecture.

Part Context

This part belongs to the 74FST series of high-speed FET-switch technology logic devices. It is pin-for-pin compatible with other industry-standard quad 2:1 mux/demux switches such as the QS3257, FST3257, and CBT3257. The device is designed to replace older bipolar technologies in high-speed digital applications requiring low power consumption and fast switching speeds.

Replacement Considerations

Pin-for-pin compatible substitutes include the QS3257, FST3257, and CBT3257. Verify electrical characteristics and package dimensions match before substitution.