Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Development, Learning, Evaluation & Industrial Control Boards |
| Origin | - |
| Chip Model | TCA9548A |
| Channel Count | 8 Independent Channels |
| Interface Type | I2C / IIC |
| Operating Voltage | 3.3V - 5V |
| Address Selection | Configurable via A0, A1, A2 pins |
| Max Bus Capacitance | 400 pF per channel |
| Package Type | TSSOP-24 mounted on PCB |
| Board Dimensions | 45mm x 35mm |
| Mounting Holes | 4 x 3mm diameter |
| Application | Arduino, Raspberry Pi, STM32 Development |
Anonymous
Mar 31, 2026
Rating: 4/5
Works as expected
Great little module. Setup was easy with the standard Arduino library. Only giving 4 stars because the silkscreen labels are a bit small to read.
Anonymous
Mar 25, 2026
Rating: 5/5
Perfect for sensor arrays
This board solved my address conflict issues immediately. I connected 8 different temperature sensors without any glitches. The soldering quality is excellent.
Anonymous
Mar 24, 2026
Rating: 4/5
Good value for money
Cheap and effective for university projects. Documentation could be better, but there are plenty of tutorials online for the TCA9548A chip.
Anonymous
Mar 23, 2026
Rating: 5/5
Clean signal integrity
Impressed by the signal quality. I was worried about noise with 8 channels active, but the multiplexer handles it very well. Highly recommended.
Anonymous
Mar 18, 2026
Rating: 5/5
Reliable expansion
Used this with a Raspberry Pi 4. The voltage levels shifted correctly between 3.3V and 5V devices. No communication drops so far.
Anonymous
Mar 05, 2026
Rating: 5/5
Essential for complex projects
If you are building a robot with multiple I2C devices, buy this. It allows you to isolate buses effectively. Very stable performance over 48 hours of testing.
Q: Is there a library available for Python on Raspberry Pi?
A: Yes, you can use the standard smbus2 library in Python to control the channel selection registers directly.
Q: Does this come with header pins soldered?
A: No, the board is shipped with unsoldered pin headers to allow for flexible mounting options. You will need to solder them yourself.
Q: Can this board work with 5V Arduino Uno?
A: Yes, the board supports operating voltages from 3.3V to 5V, making it fully compatible with the Arduino Uno.
Q: What happens if I exceed the 400pF capacitance limit?
A: Exceeding the capacitance limit may cause signal degradation or communication errors. This chip is designed to segment long buses to stay within limits per channel.
Q: How do I select the I2C address for the multiplexer itself?
A: The address is configured using the A0, A1, and A2 pins. By connecting these pins to VCC or GND, you can set one of 8 unique addresses.
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