Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Development, Learning, Evaluation & Industrial Control Boards |
| Origin | - |
| Chip Model | TCA9548A |
| Channel Count | 8 Independent I2C Channels |
| Operating Voltage | 1.65V to 5.5V |
| Interface Type | I2C / IIC |
| Address Configuration | 3 Address Pins (A0, A1, A2) |
| Max Bus Capacitance | 50pF per channel |
| Board Dimensions | 45mm x 35mm |
| Mounting Holes | 4 x 3mm Standard Holes |
| Reset Function | Active Low Reset Pin |
| Compatibility | Arduino, Raspberry Pi, ESP32 |
Anonymous
Mar 29, 2026
Rating: 4/5
Solid industrial control component
We use these in our prototyping lab. They are robust and handle voltage variations well. Would prefer if it came with a case, but for the price, it's an excellent value.
Anonymous
Mar 27, 2026
Rating: 5/5
Great for learning
Used this for my university final year project. It allowed me to interface many modules with a single microcontroller. Very reliable and no overheating issues during long test runs.
Anonymous
Mar 25, 2026
Rating: 5/5
Perfect for sensor arrays
This board solved my address conflict issues immediately. I connected eight identical temperature sensors without any code headaches. The build quality is solid and the labeling is clear.
Anonymous
Mar 19, 2026
Rating: 5/5
Plug and play simplicity
Library support for Arduino and Python is excellent. I had all 8 channels up and running in under 20 minutes. Highly recommend for anyone stuck with I2C address limitations.
Anonymous
Mar 08, 2026
Rating: 4/5
Works as expected
Great little module for expanding I2C capabilities. The only reason for 4 stars is that the header pins were not pre-soldered, but that's minor. Communication is stable at 400kHz.
Anonymous
Mar 03, 2026
Rating: 5/5
Essential for complex projects
If you are building a robot with multiple servos and sensors, you need this. It handles the multiplexing seamlessly. Documentation online is plentiful which helped me get started quickly.
Q: Can I mix devices with different voltages on the channels?
A: Yes, one of the key features of the TCA9548A is its ability to translate voltages, allowing you to connect 1.8V, 2.5V, 3.3V, and 5V devices on different channels simultaneously.
Q: How do I change the I2C address of the module?
A: You can configure the address by setting the logic levels on the A0, A1, and A2 pins. This allows for up to 8 different addresses if you need to stack multiple modules.
Q: Can this board be used with 3.3V logic levels?
A: Yes, the TCA9548A supports an operating voltage range from 1.65V to 5.5V, making it fully compatible with both 3.3V and 5V systems.
Q: Does this come with header pins included?
A: The module typically comes with the PCB only. You will need to purchase and solder your own header pins separately, allowing you to choose between straight or right-angle headers.
Q: Is there a maximum speed limit for the I2C communication?
A: The device supports standard-mode (100 kHz) and fast-mode (400 kHz) operations. It is generally not recommended to exceed 400 kHz for stability.
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