FT221XQ-T

Specialized Overview

The FT221XQ-T is a USB interface integrated circuit manufactured by FTDI, designed to bridge USB 2.0 connections to 8-bit SPI or FT1248 protocols. It operates in High-Speed mode with a data rate of 480 Mb/s and supports Full Speed at 12 Mb/s. The device is housed in a 20-pin QFN EP package and requires a supply voltage between 2.97 V and 5.5 V. It functions as a bridge controller within the USB Bridge Controllers product category.

Specialized Feature Summary

• Supports conversion between USB 2.0 and 8-bit SPI/FT1248 interfaces
• Includes battery charger detection functionality for dedicated charging ports
• Operates across extended industrial temperature ranges

Specialized Applications

• Development modules for FT221XQ full-speed USB 2.0 interfaces
• Systems requiring USB to 4-bit SPI/FT1248 translation
• Battery-powered devices utilizing dedicated charger port detection

Specialized Procurement Notes

Verify the specific suffix 'T' indicates tray packaging when sourcing. Confirm the manufacturer is Future Technology Devices International Ltd. Ensure the component matches the QFN-20 form factor. Check RoHS compliance status against current regulatory requirements before integration into final designs.

Specialized Selection Notes

Select this part when an 8-bit wide SPI or FT1248 interface is required over USB 2.0. The FT221XQ variant supports up to 4 bits of width effectively despite the 8-bit capability. Consider the QFN-20 package constraints for PCB layout. Verify power supply stability within the 2.97 V to 5.5 V range for reliable operation.

Specialized Part Context

This component belongs to the FT221X series of USB interface ICs from FTDI. It serves as a specialized bridge controller distinct from UART or FIFO variants. The FT221XQ-T is specifically packaged in trays, distinguishing it from tape-and-reel versions like the FT221XQ-R. It complements development tools such as the UMFT221XA-02 module.

Specialized Replacement Considerations

The FT221XQ-R is a direct functional substitute with identical electrical characteristics but differs in packaging format. Both parts share the same QFN-20 footprint and support USB 2.0 High-Speed modes. Verify that the application board supports the specific reel or tray handling requirements during assembly.