MCP2221AT-I/ST

Controllers Overview

The MCP2221AT-I/ST 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 integrates a composite device interface comprising Communication Device Class (CDC) for UART conversion and Human Interface Device (HID) for I2C control. The device features four general-purpose input/output pins, three ADC inputs, and one DAC output. It operates within a voltage range of 3.0V to 5.5V and supports an industrial temperature range of -40°C to +85°C. The component is housed in a TSSOP-14 package.

Controllers Feature Summary

• Integrates USB 2.0 full-speed transceiver with internal oscillator and termination resistors
• Supports USB-to-UART conversion via CDC enumeration with dynamic baud rate configuration
• Functions as an I2C/SMBus master controller using HID enumeration
• Provides configurable general-purpose I/O pins with alternate functions including ADC, DAC, and clock output

Controllers Applications

• USB-to-UART serial communication bridges
• I2C device control and configuration interfaces
• Systems requiring integrated GPIO expansion via USB
• Applications needing onboard ADC/DAC functionality connected to a host PC

Controllers Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing components. Confirm the 'I' designation corresponds to the industrial temperature range requirements for your application environment. Ensure compatibility with the required operating system drivers for Windows, Linux, or macOS platforms before finalizing procurement specifications.

Controllers Selection Notes

Select this component when a compact solution is needed to bridge USB hosts to UART or I2C peripherals without external oscillators. Consider the MCP2221A variant if higher UART baud rates up to 460800 are required compared to the standard MCP2221. Evaluate the TSSOP-14 package constraints against your PCB layout space and thermal management needs.

Controllers Part Context

This part belongs to the MCP2221A series of USB interface integrated circuits from Microchip Technology. It serves as a drop-in replacement for legacy USB-to-serial converters while adding I2C master capabilities. The 'AT' suffix typically denotes automated tape-and-reel packaging, distinguishing it from tube-packaged variants like the standard MCP2221A-I/ST.

Controllers Replacement Considerations

The MCP2221A is functionally identical to the MCP2221 except for increased maximum UART baud rate support. Verify pinout compatibility with existing designs utilizing the SOIC-14 or TSSOP-14 packages. Check if the specific packaging format (tape vs. tube) meets assembly line requirements.