74FST3400DWR2

Overview

The onsemi 74FST3400DWR2 is a 4-bit, 4-port bus exchange switch manufactured by Semiconductor Components Industries, LLC. It operates within a supply voltage range of 4.0 V to 5.5 V and features CMOS TTL compatibility. The device provides extremely low on-resistance (RON) with typical values of 4 Ω at 4.5 V and maximum propagation delays under 0.25 ns through the switch. It adds negligible standby current and prevents circuit bounce or ground noise. The component is housed in a 24-lead SOIC package.

Feature Summary

• Provides four independent 4-bit bus ports for signal routing and exchange
• Features nearly zero propagation delay and minimal on-resistance
• Eliminates circuit bounce and ground noise during switching operations
• Control inputs maintain full compatibility with standard TTL and CMOS logic levels

Applications

• High-speed data bus multiplexing and demultiplexing
• Signal routing in complex digital communication systems
• Bus exchange architectures requiring low latency
• System interconnects where signal integrity and noise reduction are critical

Procurement Notes

Verify that the specific ordering suffix matches the required tape and reel packaging specifications. Confirm the package type corresponds to the SOIC-24 variant as indicated by the DWR2 designation. Ensure all control inputs are tied to valid logic levels rather than left open to prevent undefined states. Validate that the operating temperature range aligns with the system's thermal requirements.

Selection Notes

Select this component when designing circuits that require fast, low-distortion bus switching between multiple data lines. It is suitable for applications demanding high bandwidth and minimal signal degradation. Consider the pinout compatibility with similar FST series devices if space constraints exist. Verify that the power supply voltage remains strictly within the 4.0 V to 5.5 V operational window.

Part Context

This part belongs to the 74FST logic family, which utilizes Fast-Schottky Transistor-Transistor Logic technology. The 74FST3400 specifically functions as a bus exchange switch, allowing flexible configuration of data paths. It is designed to replace older switching technologies while offering superior speed and lower power consumption characteristics compared to standard CMOS switches.

Replacement Considerations

Pin-for-pin compatible substitutes include the QS3400, FST3400, and CBT3400. These alternatives offer similar functional performance and electrical characteristics. Verify that any replacement maintains the same package dimensions and pin configuration to ensure seamless integration into existing board layouts.