FSTD32211GX

Overview

The FSTD32211GX is a bus switch integrated circuit manufactured by Fairchild Semiconductor, now part of onsemi. It features twelve independent 1:1 switches packaged in an 114-ball FBGA (16x5.5 mm) footprint. The device supports signal switching speeds up to 100 MHz for both single-ended and differential signals. It operates within a supply voltage range of 1.8 V to 3.6 V and functions across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Provides twelve independent bidirectional bus switches for signal routing
• Supports high-speed data transmission up to 100 MHz
• Compatible with low-voltage logic families including 1.8V, 2.5V, and 3.3V systems
• Designed for compact board layouts using a fine-pitch FBGA package

Applications

• High-density data bus switching in portable electronics
• Signal isolation and routing in mobile communication devices
• Level shifting between different voltage domains in embedded systems
• Peripheral interface management in consumer hardware

Procurement Notes

Verify the manufacturer marking and date code against official onsemi/Fairchild documentation to ensure authenticity. Confirm that the FBGA package dimensions and pinout match the specific datasheet revision required for your design. Check for RoHS compliance status if environmental regulations apply to your manufacturing process.

Selection Notes

Select this component when a high channel count is required in a minimal footprint. Ensure the application signals do not exceed the 100 MHz frequency limit or the specified voltage thresholds. Consider thermal dissipation requirements given the dense packaging. Verify compatibility with the system's control logic levels for the switch enable pins.

Part Context

This part belongs to the FST series of fast bus switches from Fairchild Semiconductor. The series is known for low on-resistance and high bandwidth. The 'GX' suffix typically denotes the specific FBGA package variant. Fairchild was acquired by onsemi, so current documentation and support are managed under the onsemi brand portfolio.

Replacement Considerations

The FST32211GX is a direct functional equivalent with potential minor packaging or lot variations. Verify pin-to-pin compatibility before substitution. Other parts in the FSTD32211 family may offer similar electrical characteristics but require confirmation of package integrity.