Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Development Boards & Control Boards |
| Origin | - |
| Chip Model | PCA9548A / TCA9548A |
| Voltage Supply | 2.3V to 5.5V |
| I2C Channels | 8 Independent Channels |
| Interface Protocol | I²C / SMBus Compatible |
| Address Configuration | 3 Hardware Address Pins (A0, A1, A2) |
| PCB Dimensions | 45 x 28 mm |
| Mounting Holes | 4 x 3mm Diameter |
| Operating Temperature | -40°C to +85°C |
| Logic Levels | 3.3V and 5V Compatible |
| Package Includes | 1x Multiplexer Module (Headers not included) |
Anonymous
Apr 02, 2026
Rating: 4/5
Solid performance
Works as expected according to datasheet. Voltage levels are stable. Good value for the price compared to other modules.
Anonymous
Mar 11, 2026
Rating: 5/5
Essential for multi-sensor projects
Used this to connect 8 BME280 sensors on a single bus. Worked perfectly with my Python library on Raspberry Pi. No address conflicts.
Anonymous
Feb 08, 2026
Rating: 5/5
Solved address conflicts
Finally able to use multiple identical I2C devices without changing firmware. Very stable communication across all channels.
Anonymous
Jan 31, 2026
Rating: 4/5
Good quality board
Soldering pads are clear and well spaced. Wish male headers were included in the package, but the board quality is excellent.
Anonymous
Jan 28, 2026
Rating: 5/5
Great for Raspberry Pi
Plug and play with Pi GPIO. Very reliable for my home automation sensor hub. Highly recommend for IoT projects.
Q: What library should I use for Arduino?
A: You can use the standard Wire library. You will need to write the specific channel selection byte before communicating with downstream devices.
Q: Can I daisy chain multiple multiplexers?
A: Yes, you can cascade multiple units by configuring unique addresses using the A0, A1, and A2 pins.
Q: Does this work with ESP32 microcontrollers?
A: Yes, it is compatible with any microcontroller that supports standard I2C communication, including ESP32, Arduino, and STM32.
Q: Is this module 5V tolerant?
A: Yes, the module operates between 2.3V and 5.5V, making it safe for both 3.3V and 5V systems.
Q: Are pull-up resistors included on the board?
A: Yes, onboard pull-up resistors are present for the upstream I2C bus. Downstream channels may require external pull-ups depending on your setup.
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