74FST3400DTR2

Overview

The onsemi 74FST3400DTR2 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 incorporates nearly zero standby current and eliminates circuit bounce or ground noise. The component is housed in a TSSOP-24 package.

Feature Summary

• Provides four independent bidirectional bus ports for signal routing and exchange
• Features extremely low on-resistance and negligible propagation delay
• Eliminates system noise and ground bounce during switching operations
• Control inputs maintain full compatibility with standard TTL and CMOS logic levels

Applications

• High-speed data bus multiplexing and demultiplexing
• Signal path reconfiguration in digital communication systems
• Bus arbitration and exchange in computer architecture
• Data routing between multiple peripheral devices

Procurement Notes

Verify that the specific part number matches the required TSSOP-24 package configuration. Confirm the operating voltage requirements align with the specified 4.0 V to 5.5 V range. Ensure control input logic levels are compatible with the system's TTL/CMOS standards. Validate thermal management capabilities against the junction temperature limits provided in the datasheet.

Selection Notes

Select this component when low insertion loss and minimal signal distortion are critical. The device is suitable for applications requiring fast switching speeds without introducing timing jitter. Consider the pinout compatibility with alternative FST series switches if space constraints exist. Verify that the power supply stability supports the recommended operating conditions for optimal performance.

Part Context

This device belongs to the 74FST logic family, designed for high-performance bus switching applications. It serves as a direct replacement for similar parts like the QS3400, FST3400, and CBT3400 due to its pin-for-pin compatibility. The technology leverages advanced CMOS processes to achieve superior electrical characteristics compared to older bipolar technologies.

Replacement Considerations

Direct substitutes include the QS3400, FST3400, and CBT3400, which share identical pin configurations and functional specifications.