FST3126DR2G

Overview

The FST3126DR2G is a 4-bit bus switch IC manufactured by onsemi. It belongs to the FST3126 series and is housed in a 14-SOIC package. The device functions as a digital bus switch for signal routing applications.

Feature Summary

• Provides four independent bidirectional data paths for bus switching
• Features active pull-up resistors on control inputs to ensure defined states
• Designed for low power consumption during operation

Applications

• Portable equipment requiring bus isolation
• Consumer electronics with multiple data buses
• Computing systems needing signal routing

Procurement Notes

Verify component authenticity through authorized onsemi distributors or certified partners. Confirm the part number matches the specific DR2G suffix for the 14-SOIC tape and reel packaging configuration. Check for obsolescence status as the product lifecycle indicates it may be phased out. Ensure storage conditions comply with moisture sensitivity level requirements before soldering.

Selection Notes

Select this component when a compact 4-channel bidirectional switch is required in a small outline package. Consider the operating voltage range and input logic compatibility with the system microcontroller. Evaluate the package thermal characteristics if high current switching is anticipated. Verify that the pinout aligns with the existing PCB footprint design constraints.

Part Context

This device is part of the FST3126 family from onsemi, formerly Fairchild Semiconductor. It serves as a standard solution for managing data lines in digital circuits. The SOIC-14 form factor allows for surface mount assembly in space-constrained designs. It supports various logic families commonly used in consumer and industrial electronics.

Replacement Considerations

Check for direct pin-to-pin compatible alternatives within the same FST series or equivalent offerings from other manufacturers. Ensure electrical specifications such as on-resistance and leakage current meet original design requirements. Verify package dimensions match the existing board layout.