Attributes

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

5 reviews

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.

5 FAQ

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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