MCHPMCP2221A
Overview
The MCP2221A is a versatile USB-to-UART/I2C protocol converter that enables easy communication between a USB host and serial peripherals. It supports Full-Speed USB (12 Mb/s) and provides integrated USB termination resistors and an internal oscillator to reduce external component count. Beyond simple bridge functions, the chip includes four GPIO pins, three 10-bit ADC channels, and a 5-bit DAC for basic analog and digital control.
Why Choose This Part
The MCP2221A is unique because it offers simultaneous UART and I2C functionality in a single 14-pin package. It is highly accessible for prototyping as it is available in a breadboard-friendly PDIP package and supports both 3.3V and 5V operation. The integration of 5V tolerant I/O and on-chip ADC/DAC peripherals simplifies designs that would otherwise require multiple ICs.
Applications
Key Specifications
Getting Started
For evaluation, the ADM00559 breakout board provides direct access to all pins. Developers can use the Microchip MCP2221 Utility for quick configuration of the internal flash settings and GPIO behaviors. Libraries like 'hidapi' or Microchip's provided DLLs allow for custom software development without the need for complex USB driver writing.
MCP2221 Family
Comparing specs that differ across variants. The current part is highlighted.
| Part Number | Package | Stock |
|---|---|---|
| MCP2221A (this part) | SOIC-14 | 9,526 |
| MCP2221A-I/ML (Microchip Technology) | VQFN-16 | 1,666 |
| MCP2221A-I/P (Microchip Technology) | DIP-14 | 214 |
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