MCP2221A-I/ML

Controllers Overview

The MCP2221A-I/ML is a USB-to-UART/I2C protocol converter with GPIO capabilities, manufactured by Microchip Technology. It supports Full-Speed USB 2.0 at 12 Mb/s and operates within a voltage range of 3.0V to 5.5V. The device features an industrial temperature rating from -40°C to +85°C and is housed in a QFN-16 package. It integrates a composite USB device supporting CDC for UART conversion and HID for I2C control. Key electrical parameters include a maximum I2C clock rate of 400 kHz and UART baud rates up to 460,800 bps.

Controllers Feature Summary

• Supports USB 2.0 Full-Speed communication with integrated transceiver and termination resistors.
• Functions as a composite device using standard drivers for Virtual Com Port (CDC) and I2C/GPIO control (HID).
• Includes four general-purpose I/O pins configurable for various functions including ADC, DAC, and interrupt detection.
• Provides internal configuration storage in Flash memory for persistent settings across power cycles.

Controllers Applications

• USB to UART serial bridge for embedded systems requiring asynchronous serial connectivity.
• I2C master controller for interfacing with sensors and peripherals via USB host.
• General-purpose input/output expansion module for microcontroller-based designs.

Controllers Procurement Notes

Verify the specific suffix 'I/ML' corresponds to the Industrial temperature range (-40°C to +85°C) and QFN-16 package type. Confirm that the ordering information matches the official Microchip datasheet DS20005565C. Ensure compatibility with required operating systems such as Windows XP through 10 or Linux distributions supporting CDC/HID classes before finalizing procurement.

Controllers Selection Notes

Select this component when a compact solution is needed to convert USB signals to UART or I2C interfaces without external components. Consider the QFN-16 package constraints for PCB layout and thermal management. Evaluate the need for configurable VID/PID values and the availability of the provided DLL package for custom application development on the target host system.

Controllers Part Context

This part belongs to the MCP2221A series of USB interface integrated circuits. It is functionally identical to the MCP2221 except for an increased maximum supported UART baud rate of 460,800 bps compared to 115,200 bps in the base model. The 'I' designation indicates industrial temperature operation, while 'ML' specifies the QFN-16 package variant.

Controllers Replacement Considerations

The MCP2221 serves as a direct functional replacement if lower UART baud rates are acceptable. Verify pinout compatibility between the QFN-16 packages. Check for any differences in default configuration registers or software driver requirements when substituting between these closely related models.