FTDI FT221XS-R USB to SPI/I2C Interface

The FT221XS-R is a versatile interface IC from Future Technology Devices International Ltd (FTDI), designed to facilitate USB connectivity with serial interface devices. This compact IC is part of FTDI's expansive range of USB interface solutions, providing a bridge between a USB port and SPI or I2C devices. It is an ideal choice for developers looking to integrate USB into their designs without the need for extensive protocol knowledge.

The FT221XS-R operates as a USB to SPI or USB to I2C master converter, featuring an integrated USB 2.0 full-speed function controller, USB transceiver, oscillator, and Universal Asynchronous Receiver-Transmitter (UART). This IC is capable of data transfer rates of up to 3 Mbps, ensuring efficient communication with peripheral devices.

Encased in a compact SSOP16 package, the FT221XS-R is equipped with FTDI’s proprietary royalty-free Virtual COM Port (VCP) and Direct (D2XX) drivers. This allows for seamless integration with a wide range of operating systems, including Windows, Mac OS, Linux, and Android. The device is also fully compliant with USB 2.0 specifications, ensuring broad compatibility with standard USB controllers.

Key features of the FT221XS-R include:

• Single chip USB to SPI or I2C interface.
• Integrated 2048-byte Multi-Time-Programmable (MTP) memory for storing device configuration.
• Low operating and USB suspend current for power-efficient designs.
• Configurable I/O pin output drive strength.
• Battery charger detection, allowing for increased charging current on charging ports.
• Support for bus-powered, self-powered, and high-power bus-powered USB configurations.

The FT221XS-R is perfect for applications that require a serial interface to communicate with SPI or I2C devices, such as sensors, memory sticks, or LCD displays. Its robust feature set and ease of use make it a popular choice for embedded systems, point-of-sale terminals, and industrial control systems, among others.