MCP2221A-I/SL

Controllers Overview

The MCP2221A-I/SL is a USB-to-UART/I2C bridge device in a 14-pin SOIC package. It supports Full-Speed USB 2.0 at 12 Mb/s and operates on a supply voltage of 3.0V to 5.5V with a typical current draw of 13 mA. The industrial temperature range spans from -40°C to +85°C. It features a composite USB interface: CDC for UART conversion supporting baud rates up to 460,800 bps, and HID for I2C master control up to 400 kHz. The device includes four configurable GPIO pins, three ADC inputs, one DAC output, and an internal oscillator.

Controllers Feature Summary

• Implements a composite USB protocol combining Communication Device Class (CDC) for serial communication and Human Interface Device (HID) for I2C control and configuration.

Controllers Applications

• USB to UART serial data conversion
• I2C master controller for peripheral devices
• General purpose input/output expansion

Controllers Procurement Notes

Verify the specific suffix 'I/SL' corresponds to the SOIC-14 package and industrial temperature grade (-40°C to +85°C). Confirm that the ordering information matches the Microchip Technology datasheet DS20005565C. Ensure compatibility with standard Windows drivers or Linux CDC/HID classes as documented.

Controllers Selection Notes

Select this component when a single-chip solution is required for both UART and I2C connectivity via USB. The MCP2221A offers higher maximum UART baud rates compared to the base MCP2221 model. Consider the integrated oscillator and USB transceiver to minimize external component count in the design.

Controllers Part Context

This part belongs to the MCP2221A series of USB interface ICs manufactured by Microchip Technology. It serves as a bridge between USB hosts and legacy UART or I2C peripherals. The 'I' designation indicates industrial temperature rating, while 'SL' specifies the SOIC-14 surface-mount package type.

Controllers Replacement Considerations

MCP2221-I/SL

Controllers FAQ

What is the difference between MCP2221A and MCP2221?

The MCP2221A supports a maximum UART baud rate of 460,800 bps, whereas the MCP2221 is limited to 115,200 bps. All other functional aspects are identical.

How does the device handle power supply?

It can be bus-powered from the USB 5V line or self-powered using an external 3.3V source connected to VDD. An internal LDO provides 3.3V to the USB transceiver if VUSB is not externally powered.