74FST3251D

Overview

The onsemi 74FST3251D is an 8:1 multiplexer/demultiplexer bus switch designed for high-performance data routing applications. Operating within a voltage range of 4 to 5.5 Volts, the device maintains CMOS and TTL compatibility. It features extremely low on-resistance (RON) and adds nearly zero propagation delay to the system. The component exhibits minimal noise and ground bounce, ensuring signal integrity during operation.

Feature Summary

• Provides 8-to-1 multiplexing and demultiplexing capabilities for bus switching applications
• Maintains compatibility with both CMOS and TTL logic families across specified operating voltages
• Delivers high performance through extremely low on-resistance characteristics
• Ensures signal integrity by adding negligible propagation delay and eliminating system noise or ground bounce

Applications

• High-speed data bus switching in computing systems
• Multiplexing control signals in telecommunications equipment
• Demultiplexing data lines in industrial automation controllers
• Signal routing in automotive electronic control units

Procurement Notes

Verify the specific suffix 'D' corresponds to the SOIC-16 package (CASE 751B) as documented in official datasheets. Confirm that the part number matches the exact electrical specifications required for your design, particularly the 4V to 5.5V operating range. Ensure compatibility with existing PCB footprints and thermal requirements before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring efficient 8:1 signal routing with minimal signal degradation. The device is suitable for environments where maintaining strict timing margins is critical due to its near-zero propagation delay. Consider the SOIC-16 package constraints and ensure the supply voltage remains within the 4V to 5.5V window to guarantee proper CMOS/TTL compatibility and optimal on-resistance performance.

Part Context

This component belongs to the 74FST series of high-speed logic devices manufactured by onsemi. The FST series is engineered for fast switching speeds and low power consumption, making it ideal for modern digital systems. The 74FST3251 specifically addresses the need for reliable bus switching in complex digital architectures where multiple data sources must be routed efficiently without introducing significant latency or interference.

Replacement Considerations

Consult official cross-reference guides for compatible alternatives. Verify that any substitute maintains the same 8:1 configuration, SOIC-16 package, and 4V-5.5V operating voltage range. Ensure equivalent RON and propagation delay specifications to prevent signal integrity issues in sensitive high-speed applications.