MCP2221-I/P

Controllers Overview

The MCP2221-I/P is a USB-to-UART/I2C bridge device manufactured by Microchip Technology, housed in a 14-pin PDIP package. It supports Full-Speed USB 2.0 at 12 Mb/s and operates on a supply voltage of 3.0 V to 5.5 V with a typical operating current of 13 mA. The component functions as a composite USB device, utilizing Communication Device Class (CDC) for UART conversion and Human Interface Device (HID) for I2C control. It features an industrial temperature range from -40°C to +85°C.

Controllers Feature Summary

• Integrates USB transceiver and oscillator, eliminating the need for external components.
• Supports simultaneous USB-to-UART conversion via CDC and I2C master control via HID.
• Includes four configurable general-purpose input/output pins with alternate function capabilities.
• Features internal flash memory for persistent configuration storage of VID, PID, and pin assignments.

Controllers Applications

• USB to UART serial communication bridges
• I2C/SMBus master controllers for peripheral management
• General-purpose GPIO expansion modules

Controllers Procurement Notes

Verify the specific ordering suffix 'I/P' corresponds to the Industrial temperature grade (-40°C to +85°C) and the PDIP-14 through-hole package. Confirm that the datasheet revision matches the required specifications for your design. Ensure compatibility with the host system's USB controller requirements.

Controllers Selection Notes

Select this component when a single-chip solution is needed for both UART and I2C connectivity over USB. Consider the PDIP-14 package if through-hole mounting is required for mechanical stability or prototyping. Verify that the host software stack supports standard Windows drivers or Linux CDC/HID classes for enumeration.

Controllers Part Context

This part belongs to the MCP2221 family of USB interface ICs. The '-I' suffix denotes the industrial temperature rating, while '/P' indicates the Plastic Dual In-line Package. Other variants include surface-mount options like SOIC and QFN packages, as well as the enhanced MCP2221A series.

Controllers Replacement Considerations

Direct replacements within the same package and electrical characteristics include other MCP2221 variants with different package suffixes (e.g., MCP2221-I/SL for SOIC). For functional equivalents with similar interfaces, consider the MCP2200 series, though pinouts and feature sets may differ significantly.

Controllers FAQ

Does the MCP2221 require external components for USB operation?

No, the MCP2221 integrates the USB transceiver and oscillator, requiring only a bypass capacitor on the VUSB pin for proper operation.

What is the maximum I2C clock rate supported by the device?

The device supports an I2C master clock rate of up to 400 kHz.

Can the VID and PID be changed after manufacturing?

Yes, the Vendor ID (VID) and Product ID (PID) are stored in on-chip Flash memory and can be configured using the Microchip Configuration Utility.