MCP2221A-I/ST Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip MCP2221A-I/ST is a USB 2.0 to I2C/UART protocol converter with GPIO in a TSSOP-14 package. It supports up to 12 MHz clock and 1.5 MBps data transfer, providing seamless connectivity between USB hosts and I2C, SMBus, or UART peripherals. Ideal for embedded system development and industrial interface bridging.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- MCP2221A-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 I2C, SMBus, and UART bridge in a single chip
- Up to 12 MHz I2C clock and 1.5 MBps USB data transfer rate
- 4 general-purpose I/O pins with configurable functions including ADC and DAC
- TSSOP-14 compact package enabling minimal PCB footprint
- No external crystal needed — USB provides clocking for plug-and-play operation
Applications
The MCP2221A-I/ST is widely used as a USB-to-I2C or USB-to-UART bridge in embedded development tools, sensor evaluation boards, and industrial data acquisition systems. It allows Windows, Linux, and macOS hosts to communicate directly with I2C sensors, EEPROMs, or UART devices at up to 1.5 MBps without custom drivers. Its integrated GPIO with ADC and DAC functions make it a versatile interface solution for rapid prototyping and low-volume production.
Specifications
| Manufacturer Package Code | TSSOP-14 |
| Factory Lead Time | 14Weeks |
| Date Of Intro | 2016-06-15 |
| YTEOL | 18 |
| 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 |
| 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 | BUS CONTROLLER, UNIVERSAL SERIAL BUS |
| ## MCP2221A-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 MCP2221A-I/ST:
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Frequently Asked Questions
Which communication interfaces does the MCP2221A-I/ST support and at what speeds?
The MCP2221A-I/ST supports USB 2.0 Full-Speed, I2C up to 400 kHz (Fast mode), SMBus, and UART interfaces. Its USB interface delivers up to 1.5 MBps data throughput, while the I2C port operates at standard 100 kHz or fast 400 kHz, enabling flexible connectivity to a wide range of peripheral devices.
Can the MCP2221A-I/ST be used to interface a PC with I2C sensors in a lab setup?
Yes, the MCP2221A-I/ST is an excellent USB-to-I2C bridge for PC-based sensor evaluation. It connects directly to a USB host and presents as a HID device, requiring no custom drivers. The I2C interface operates at up to 400 kHz and the chip supports 4 GPIO pins that can serve as ADC inputs (10-bit resolution) or DAC outputs, making it ideal for lab instrumentation.
What package does MCP2221A-I/ST use and how many pins does it have?
The MCP2221A-I/ST comes in a TSSOP-14 package with 14 pins. The narrow TSSOP body measures approximately 5 mm × 4.4 mm, providing a compact SMD footprint suitable for space-constrained PCB designs while still supporting hand soldering during prototyping.
How does MCP2221A-I/ST compare to CH340 USB-UART converters for UART bridging?
Unlike single-function CH340 devices, the MCP2221A-I/ST adds I2C and SMBus support alongside UART bridging, plus 4 GPIO with 10-bit ADC and 5-bit DAC. While CH340 targets pure UART at high baud rates, the MCP2221A-I/ST suits designs needing multi-protocol access through a single USB port at up to 1.5 MBps total throughput.
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