Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Development Boards & Control Boards |
| Origin | - |
| Chip Model | TCA9548A / PCA9548 |
| Operating Voltage | 2.3V to 5.5V |
| Channel Count | 8 Downstream Channels |
| Interface Type | I²C / IIC Bus |
| Address Selection | 3 Hardware Address Pins (A0, A1, A2) |
| PCB Dimensions | 35mm x 25mm |
| Operating Temperature | -40°C to +85°C |
| Connector Pitch | 2.54mm Standard Header |
| Mounting Type | Through-Hole |
| Package Weight | 5 grams |
Anonymous
Feb 14, 2026
Rating: 5/5
Reliable Communication
Stable communication across all 8 channels. Voltage range is accurate as described in the datasheet.
Anonymous
Feb 14, 2026
Rating: 5/5
Solved My I2C Issues
Had multiple devices with the same address. This multiplexer separated them perfectly. Easy to configure.
Anonymous
Feb 13, 2026
Rating: 5/5
Perfect for Sensor Hubs
Used this to connect 8 temperature sensors without address conflicts. Works flawlessly with Arduino and Raspberry Pi.
Anonymous
Feb 11, 2026
Rating: 4/5
Compact and Useful
Fits well in tight enclosures. Wish it came with headers soldered, but easy to add them yourself.
Anonymous
Jan 27, 2026
Rating: 4/5
Solid Module
Good build quality. Just remember to manage the bus capacitance on longer lines for best performance.
Q: How do I change the I2C address of the multiplexer?
A: Use the A0, A1, and A2 pins to set the hardware address. Connect them to VCC or GND to configure.
Q: Is this compatible with 3.3V logic systems?
A: Yes, the module operates from 2.3V to 5.5V, making it compatible with both 3.3V and 5V systems.
Q: Does this board provide voltage level shifting?
A: No, this is a multiplexer only. Please use a separate level shifter if connecting devices with different voltage domains.
Q: Is there a specific Arduino library required?
A: No, the standard Wire library works. You just need to send a command to select the active channel.
Q: What is the maximum clock frequency supported?
A: It supports up to 400kHz standard I2C speed as per the TCA9548A specifications.
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