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A USB-to-I2C adapter that allows a computer to act as an I2C bus controller, supporting speeds over 1 MHz, clock stretching, and bidirectional communication. The device offers full galvanic isolation between USB and I2C, protecting the computer from damage and interference, and provides an isolated 3.3V or 5V voltage, eliminating the need for an external I2C power supply. With JST SH and goldpin connectors, USB-C support, a virtual serial port, and a Python library, the adapter is a versatile tool for working with I2C devices in both hobbyist and professional projects. Pololu 5397
The USB–I²C adapter is a practical tool that allows a PC or another USB host to act as an I²C bus controller. This enables easy communication with peripheral devices operating as slaves. The device supports bidirectional data transfer, clock stretching, and I²C bus speeds exceeding 1 MHz, allowing it to work with modern, high-speed devices. A very important feature of the adapter is full galvanic isolation between the USB side and the I²C side, which effectively protects the computer and USB ports from unwanted current flow and harmful voltages. In the event of voltage faults on the I²C bus, the adapter itself may be damaged, but the isolation prevents the voltage from propagating back to the USB side.
The adapter can supply isolated, regulated 3.3 V or 5 V power (up to 200 mA) to the I²C bus, so many projects do not require a separate power source on the bus side. The voltage level is selected with a slide switch, and the state is latched at startup; the VCC output can also be enabled/disabled via the software command “Enable VCC Out”. Standard 2.54 mm pin headers are available, making it easy to connect jumper wires or pin headers. On the I²C side, a JST SH 4-pin connector is provided, compatible with SparkFun Qwiic and Adafruit STEMMA QT systems:
The device is equipped with a USB Type-C connector, and when connected to a computer it is recognized as a virtual serial port (CDC ACM). This allows it to work without installing additional drivers in Windows 10 and newer, Linux, and macOS. Communication can be carried out from any programming environment that supports serial ports, making the adapter highly versatile. Additionally, the manufacturer provides a Python library for quick development, as well as fully open-source firmware for the STM32C071G8 microcontroller, allowing further customization of functionality. Thanks to its compact size and low weight, the module can be easily integrated into various projects. This makes it an ideal solution for both hobbyists and professionals working with I²C devices who require a reliable and safe communication interface.
Manufacturer BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
Responsible person BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
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A module that provides galvanically isolated, bidirectional I²C communication and isolated power supply, protecting devices from misconnections and voltage differences. Thanks to the TI ISO1640B device, it supports data transfer up to 1.7 MHz, and the power supply isolation via MPS MIE1W0505BGLVH eliminates ground loops and interference. Pololu 5392
No product available!
Adafruit 2264
A module that provides galvanically isolated, bidirectional I²C communication and isolated power supply, protecting devices from misconnections and voltage differences. Thanks to the TI ISO1640B device, it supports data transfer up to 1.7 MHz, and the power supply isolation via MPS MIE1W0505BGLVH eliminates ground loops and interference. Pololu 5393
No product available!
A module that provides galvanically isolated, bidirectional I²C communication (SDA and SCL lines), protecting devices from incorrect connections and voltage differences. Thanks to the TI ISO1640B chip, it supports data transfer up to 1.7 MHz. Pololu 5390
No product available!
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A USB-to-I²C adapter that allows a computer to act as an I²C bus controller, supporting speeds over 1 MHz, clock stretching, and bidirectional communication. The device offers full galvanic isolation between USB and I²C, protecting the computer from damage and interference. With JST SH and goldpin connectors, USB-C support, a virtual serial port, and a Python library, the adapter is a versatile tool for working with I²C devices in both hobbyist and professional projects. Pololu 5396
No product available!
USB-UART/I2C converter based on the MCP2221 chip. It enables communication of devices with UART or I2C interface with a computer. SB Components 21246
A USB-to-I2C adapter that allows a computer to act as an I2C bus controller, supporting speeds over 1 MHz, clock stretching, and bidirectional communication. The device offers full galvanic isolation between USB and I2C, protecting the computer from damage and interference, and provides an isolated 3.3V or 5V voltage, eliminating the need for an external I2C power supply. With JST SH and goldpin connectors, USB-C support, a virtual serial port, and a Python library, the adapter is a versatile tool for working with I2C devices in both hobbyist and professional projects. Pololu 5397