FSTD32211GX

Overview

The FSTD32211 is a high-speed CMOS bus switch providing up to 48 bits of TTL-compatible switching. It features a low on-resistance of 4 ohms and integrated level shifting between 5V inputs and 3.3V outputs via an internal diode. The device supports flexible routing as four 12-bit, two 24-bit, or one 48-bit switch, or alternatively as 40-bit configurations. It operates with a supply voltage range of 4.5V to 5.5V and includes four independent output enable controls.

Feature Summary

• Provides high-speed bus switching with minimal propagation delay
• Integrates level shifting capability for 5V to 3.3V translation
• Supports flexible multi-bit configuration routing options
• Features low quiescent current consumption

Applications

• High-speed data bus interconnects
• Level shifting between different voltage domains
• System board signal routing
• Portable electronic devices requiring low power

Procurement Notes

Verify the specific ordering suffix when purchasing. The 'G' suffix indicates tray packaging, while appending 'X' specifies tape and reel packaging. Confirm package details match the BGA114A specification. Ensure compatibility with the required operating temperature range of -40°C to +85°C before procurement.

Selection Notes

Select this component for applications requiring multiple parallel bus lines with mixed voltage levels. The 4-ohm on-resistance ensures signal integrity without significant ground bounce. Verify that the 4.5V to 5.5V supply requirement aligns with the system design. Consider the FBGA package constraints for PCB layout and thermal management during selection.

Part Context

This device belongs to the Fairchild Switch family, utilizing proven switch technology similar to the FST3384 series. It is designed for high-density applications where space and power efficiency are critical. The part serves as a bridge for connecting various digital components across different logic families within a single system architecture.

Replacement Considerations

Consult official documentation for direct substitutes. Verify pinout compatibility and electrical characteristics such as on-resistance and voltage ratings. Ensure the replacement supports the same 40/48-bit configuration flexibility and level shifting requirements.