Attributes

Brand	-
Category	Electronic Components / Maker DIY / Development Boards & Control Boards
Origin	-
Chip Model	TCA9548A / PCA9548A
Voltage Logic	3.3V and 5V Compatible
Channel Count	8 Downstream Channels
Interface Type	I²C / SMBus
Address Pins	A0, A1, A2 (8 Configurable Addresses)
Reset Pin	Active LOW Reset
Max Clock Frequency	400 kHz
Operating Temperature	-40°C to 85°C
Board Dimensions	32mm x 22mm
Weight	5 grams

5 reviews

Anonymous

Apr 16, 2026

Rating: 5/5

Reliable I2C switching

Used in a classroom setting for teaching embedded systems. Students found it easy to integrate with the standard Wire library.

Anonymous

Apr 15, 2026

Rating: 5/5

Perfect for sensor arrays

Works great with Arduino. I was able to connect 8 different I2C sensors without any address conflicts. The build quality is solid.

Anonymous

Apr 01, 2026

Rating: 4/5

Good value module

Solid build and functions as expected. Wish the header pins were pre-soldered, but that's a minor inconvenience for the price.

Anonymous

Mar 09, 2026

Rating: 4/5

Works as expected

Does exactly what it should. Documentation could be slightly better regarding pull-up resistor values, but overall happy.

Anonymous

Feb 24, 2026

Rating: 5/5

Solved my address conflict

Needed this for multiple OLED displays and IMUs. The address pins make it easy to stack multiple multiplexers if needed.

5 FAQ

Q: What is the maximum current per channel?

A: Please refer to the TCA9548A datasheet, but typically it handles standard I2C signaling currents suitable for logic switching.

Q: Can I daisy chain multiple multiplexers?

A: Yes, you can connect up to 8 of these modules on the same bus by configuring the A0, A1, and A2 address pins differently.

Q: Are pull-up resistors included on the board?

A: Yes, the module includes necessary pull-up resistors for the I2C lines, so you can connect it directly to your controller.

Q: Is this compatible with Raspberry Pi GPIO?

A: Yes, it works perfectly with Raspberry Pi models using the SMBus or I2C GPIO pins and standard Python libraries.

Q: Is this module compatible with 5V logic levels?

A: Yes, the VCC range is 2.3V to 5.5V, so it works safely with both 3.3V and 5V microcontrollers.

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