MCP2221AT-I/ST Microchip Integrated Circuit (Small Outline Packages) In Stock
The MCP2221AT-I/ST is a USB 2.0 to UART/I2C serial converter from Microchip in a 14-pin TSSOP package. It supports data rates up to 1.5 Mbps and operates at 12 MHz clock, enabling USB connectivity for embedded systems. In stock worldwide with fast shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- MCP2221AT-I/ST Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.0400(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP2221AT-I/ST?
- USB 2.0 Full-Speed to UART and I2C bridge eliminates FTDI chip dependency for simple host connectivity
- Data transfer rate up to 1.5 Mbps over USB with 12 MHz internal oscillator for low-latency serial communication
- Supports I2C, SMBUS, UART, and USB bus compatibility in a single 14-pin TSSOP package
- 4 general-purpose I/O pins with configurable ADC and DAC functions add analog measurement capability without extra ICs
What is MCP2221AT-I/ST used for?
The MCP2221AT-I/ST enables USB-to-serial bridging in embedded development boards, industrial sensor gateways, and PC-connected test fixtures requiring I2C or UART access. It is commonly used in USB dongle designs to communicate with SMBUS-compliant power management ICs and I2C EEPROMs. The compact 14-pin TSSOP footprint fits tight PCB layouts in handheld instruments and USB-powered data loggers.
What are the specifications of MCP2221AT-I/ST?
| 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 |
| ## MCP2221AT-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 |
Where can I find the MCP2221AT-I/ST datasheet?
MCP2221AT-I/ST Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP2221AT-I/ST?
Compatible alternatives and drop-in replacements for MCP2221AT-I/ST:
suggested
suggested
suggested
suggested
Frequently Asked Questions
What serial interfaces does the MCP2221AT-I/ST support and at what maximum data rate?
The MCP2221AT-I/ST supports I2C, SMBUS, UART, and USB 2.0 Full-Speed interfaces. The maximum USB data transfer rate is 1.5 Mbps, and the internal clock runs at 12 MHz. UART baud rates are configurable from 300 bps to 115200 bps, making it suitable for both legacy serial sensors and high-speed streaming applications.
How does the MCP2221AT-I/ST compare to using a dedicated FTDI chip for a USB-to-I2C bridge?
The MCP2221AT-I/ST integrates USB-to-UART and USB-to-I2C bridging in a 14-pin TSSOP measuring 5mm x 4.4mm, while FTDI FT232H requires a 32-pin QFN. Microchip's device includes 4 GPIO pins with 10-bit ADC and 5-bit DAC, removing the need for a separate analog front end. It operates from a single 3.3V to 5V supply with less than 50 mA draw.
Can the MCP2221AT-I/ST be used to interface a PC with an I2C temperature sensor for data logging?
Yes. The MCP2221AT-I/ST presents as a HID device on the PC, requiring no custom driver on Windows, macOS, or Linux. It bridges USB to I2C at up to 400 kHz Fast Mode, directly reading I2C temperature sensors with 12-bit resolution such as MCP9808. A 14-week factory lead time applies for large orders, but standard-quantity stock ships immediately.
What supply voltage range does the MCP2221AT-I/ST require, and is it 5V tolerant on its I/O pins?
The MCP2221AT-I/ST operates from 3.3V to 5.5V supply voltage, making it directly compatible with both 3.3V microcontroller systems and 5V USB bus power. Its I/O pins are rated to VDD, so a 5V supply provides 5V-compatible logic levels. The TSSOP-14 package supports a peak reflow temperature of 260°C for standard lead-free assembly.
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