Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Function | USB to I2C/UART protocol converter with GPIO |
| UART baud rate | 300 to 460800 baud |
| I2C host clock | Up to 400 kHz |
| GPIO | 4 configurable GP pins |
| Operating voltage | 3.0 V to 5.5 V |
| Temperature range | -40°C to +85°C |
| Package | 14-lead TSSOP, 4.4 mm body |
| Packing | Standard / non-T order form |
Product Overview
The MCP2221A-I/ST is the industrial-temperature 14-lead TSSOP version of Microchip’s MCP2221A USB-to-I2C/UART bridge. It provides the same protocol-conversion engine as the QFN version while using a leaded package that can be easier to inspect, prototype and rework.
The ST suffix identifies the 4.4 mm-body TSSOP. UART operation extends from 300 to 460800 baud and I2C host operation reaches 400 kHz. Four GP pins can be configured for GPIO or supported alternate functions, giving the device additional host-controlled utility beyond serial bridging.
Technical Specifications
| Parameter | Confirmed Information |
|---|---|
| UART baud range | 300 to 460800 |
| I2C clock | Up to 400 kHz |
| I2C addressing | 7-bit; 10-bit through host-library support |
| SMBus host | Supported |
| GPIO | GP0 to GP3 |
| Operating voltage | 3.0 V to 5.5 V |
| Temperature range | -40°C to +85°C |
| Package | 14-lead TSSOP, 4.4 mm body |
| Product status | In Production |
Design Considerations
The TSSOP package is physically and electrically packaged differently from the 16-lead QFN ML version. Preserve the exact footprint and pin mapping when moving between package options even though the bridge function is shared.
For high-volume automated assembly where reel packaging is required, the MCP2221AT form is the catalog T&R option. The non-T MCP2221A-I/ST is the standard package-order form.
Related Engineering Resources
- MCP2221A USB 2.0 to I2C/UART Protocol Converter Data Sheet
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
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