FT260S-U

Controllers Overview

The FT260S-U is a single-chip USB to UART/I2C bridge device controller manufactured by Future Technology Devices International Ltd. It operates as a USB 2.0 compliant Full Speed device with standard Human Interface Device (HID) class support, handling the entire USB protocol on-chip. The component features two independent interfaces: an I2C interface and a UART interface, each supported by its own physical USB HID descriptor. Key electrical parameters include a typical active operating current of 24mA and a typical suspend current of 385µA. The device integrates a 5V-to-3.3V-to-1.8V level converter for USB I/O and supports bus-powered, self-powered, and bus-powered configurations with power switching. It utilizes a true 3.3V CMOS drive output with TTL input capabilities, operating down to 1.8V with external pull-ups.

Controllers Feature Summary

• Integrates dual independent interfaces for simultaneous I2C and UART communication over a single USB connection using standard HID class drivers without custom software installation.
• Includes an integrated oscillator PLL eliminating the need for external crystals, alongside an on-chip eFUSE for programming USB Vendor ID, Product ID, and vendor-specific parameters.
• Features built-in voltage level conversion from 5V to 3.3V and 1.8V, along with a +5V USB VBUS detection engine for flexible power configuration management.

Controllers Applications

• Embedded systems requiring direct USB connectivity for serial data logging or debugging via UART.
• IoT devices needing I2C sensor integration through a standard USB port without proprietary driver dependencies.
• Portable consumer electronics utilizing bus-powered designs where low active and suspend currents are critical for battery efficiency.

Controllers Procurement Notes

Verify the specific suffix 'U' against the manufacturer's official documentation to confirm package type and tape-and-reel specifications. Ensure that the required USB VID and PID values programmed into the eFUSE match your system's host requirements. Confirm compatibility with the target operating system's native HID class drivers for both UART and I2C functionalities before finalizing procurement.

Controllers Selection Notes

Select the FT260S-U when a solution is needed that avoids installing custom USB drivers by leveraging standard HID class support. This component is suitable for designs requiring both serial and I2C connectivity from a single USB source. Consider the integrated level shifting and lack of external crystal requirements when evaluating board space and BOM complexity compared to other bridge controllers.

Controllers Part Context

The FT260 series represents FTDI's approach to simplifying USB integration in embedded applications by removing the need for custom drivers. The FT260S-U specifically targets applications where space constraints and power efficiency are priorities. Its HID-class compliance distinguishes it from traditional VCP-based USB bridges, offering a different integration path for developers seeking plug-and-play functionality across various host platforms.

Controllers Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Evaluate alternative USB-to-UART/I2C bridges based on HID class support and pinout compatibility if substitution is necessary.

Controllers FAQ

Does the FT260S-U require custom drivers for operation?

No, the FT260S-U uses standard Human Interface Device (HID) class support, allowing it to function with native OS drivers without requiring custom software installation.

What power supply options does the FT260S-U support?

The device supports bus-powered, self-powered, and bus-powered with power switching configurations, managed by an integrated +5V USB VBUS detection engine.

Is an external crystal required for the FT260S-U?

No, the FT260S-U includes an integrated oscillator PLL, so no external crystal is required for operation.