The SparkFun Qwiic Mux Breakout uses the TCA9548A to provide 8 independent I2C channels, solving the common problem of multiple sensors sharing the same address. Simply route each device to its own channel and communicate with all of them on a single bus.

With 8 configurable addresses (via solder jumpers), you can daisy-chain up to 8 mux breakouts for a total of 64 I2C channels. The board operates from 1.65V to 5.5V and uses Qwiic connectors for solderless, polarised connections.

Key Features

• 8 I2C Channels – Connect up to 8 same-address devices
• TCA9548A IC – Reliable I2C multiplexer with wide voltage range
• 8 Configurable Addresses – Solder jumper selectable (3 ADR jumpers)
• Qwiic Connectors – Solderless, polarised I2C connections
• 1.65–5.5V Operation – Compatible with 3.3V and 5V systems
• Cascadable – Up to 64 channels with 8 mux boards

Specifications

• IC: TCA9548A
• I2C Channels: 8
• Default Address: 0x70 (configurable 0x70–0x77)
• Operating Voltage: 1.65–5.5V
• Connector: Qwiic (JST 1mm, 4-pin)

Ideal For

• Using multiple identical Qwiic sensors on one bus
• Expanding I2C address space
• Multi-sensor projects with address conflicts
• Large-scale I2C sensor networks

Package Contents

• 1× SparkFun Qwiic Mux Breakout – 8 Channel (TCA9548A)