MCP2221-I/ST Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip MCP2221-I/ST is a USB 2.0 Full-Speed to UART/I2C serial converter with GPIO in a TSSOP-14 package, supporting 12 MHz clock and up to 1.5 Mbps data rates. Available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- NOT RECOMMENDED
- Datasheet
- MCP2221-I/ST Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- USB 2.0 Full-Speed to UART and I2C/SMBus bridge in a single 14-pin TSSOP package
- Up to 12 MHz clock frequency with 1.5 Mbps maximum data transfer rate
- 4 general-purpose I/O pins configurable as ADC inputs or DAC outputs for mixed-signal interfacing
- Driver-free HID class operation on Windows, Linux, and macOS; no custom driver needed
Applications
The MCP2221-I/ST is widely deployed as a USB-to-I2C/UART debug bridge in evaluation boards, USB sensor dongles, and PC-based test equipment. Engineers use it to add USB connectivity to legacy UART-based embedded systems or to prototype I2C sensor arrays without a dedicated microcontroller. Its HID-class USB profile eliminates driver installation overhead in industrial and lab environments.
Specifications
| Manufacturer Package Code | TSSOP-14 |
| Factory Lead Time | 14Weeks |
| YTEOL | 3 |
| Bus Compatibility | I2C; SMBUS; UART; USB |
| Clock Frequency-Max | 12MHz |
| Data Transfer Rate-Max | 1.5MBps |
| JESD-30 Code | R-PDSO-G14 |
| JESD-609 Code | e3 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP14,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Qualification Status | Not Qualified |
| Screening Level | AEC-Q100; TS 16949 |
| Supply Current-Max | 15mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 3V |
| Supply Voltage-Nom | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| uPs/uCs/Peripheral ICs Type | SERIAL IO/COMMUNICATION CONTROLLER, SERIAL |
| ## MCP2221-I/ST Alternates Showing results | Image |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Philippines, Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP2221-I/ST:
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Frequently Asked Questions
What communication interfaces does the MCP2221-I/ST support between USB and the target device?
The MCP2221-I/ST bridges USB 2.0 Full-Speed to both UART and I2C/SMBus simultaneously. The I2C port supports standard 100 kHz, fast 400 kHz, and fast-plus 1 MHz modes. The UART channel supports baud rates up to 115200 bps for legacy serial peripherals.
Does the MCP2221-I/ST require a custom USB driver to operate on a host PC?
No. The MCP2221-I/ST enumerates as a USB HID class device, which means it uses the built-in HID drivers on Windows, Linux, and macOS. No custom INF or kernel driver is needed, and enumeration completes in under 1 second, simplifying production test and field deployment.
How many GPIO pins does the MCP2221-I/ST provide, and what analog functions can they perform?
The MCP2221-I/ST provides 4 GPIO pins that can be individually configured as digital I/O, ADC inputs with 10-bit resolution, or DAC outputs with 5-bit resolution. The ADC reference can be set to VDD or an internal 1.024 V, 2.048 V, or 4.096 V reference, allowing voltage measurement without external components.
Which applications benefit most from replacing a discrete FTDI or CP2102 bridge with the MCP2221-I/ST?
Designs that also need analog sensing benefit most because the MCP2221-I/ST adds 10-bit ADC and 5-bit DAC channels unavailable on pure UART bridges like FT232RL or CP2102. Applications such as USB-connected temperature loggers, soil-moisture USB probes, and bench power-supply front panels can read sensor voltages over the same 3.3 V supply rail used by the USB interface.
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