The MCP2221A-I/ST is a USB-to-UART/I2C serial converter which enables USB connectivity in applications that have a UART and I2C interfaces. The device reduces external components by integrating the USB termination resistors and the oscillator needed for USB operation. The MCP2221A-I/ST also has four GP pins providing miscellaneous functionalities (GPIO, USBCFG, SSPND, Clock Output, ADC, DAC, interrupt detector).The MCP2221A-I/ST is identical to the MCP2221 in all aspects except for the maximum supported baud rate of the UART, which has been increased from 115200 (MCP2221) to 460800 (MCP2221A). All MCP2221 USB Drivers and Software can be used for the MCP2221A.
Feature
Universal Serial Bus (USB)
Supports full-speed USB (12 Mb/s)
Implements USB protocol composite device:
Communication Device Class (CDC) for communications and configuration
Human Interface Device (HID) for I2C™, chip control and configuration
128-byte Buffer to handle data throughput at any UART baud rate:
64-byte Transmit
64-byte Receive
Human Interface Device (HID) for both I2C™ communication and control.
Fully configurable VID and PID assignments, and string descriptors
Bus-powered or self-powered
USB 2.0 Compliant
USB Driver and Software Support
CDC and Universal Asynchronous Receiver/Transmitter (UART) Options
I2C™/SMBus
SMBus Master
General Purpose Input/Output (GPIO) Pins
Highly Configurable
Operating voltage: 3.0 – 5.5V
Electrostatic Discharge (ESD) protection:
Industrial (I) Operating Temperature: -40°C to +85°C
Catalogue
FPGA / CPLD
Memory
MOS 
MCU 
DSP
OCEP
Secondary 
Other 
