SparkFun STEMMA QT / Qwiic TCA9548A Mux Breakout - 8 Channel

Do you have too many sensors with the same I2C address? Put them on the SparkFun Qwiic Mux Breakout to get them all talking on the same bus! The Qwiic Mux Breakout with TCA9548A enables communication with multiple I2C devices that have the same address that makes it simple to…

VCC
main I2C/Qwiic bus supply for the TCA9548A mux breakout; SparkFun says the breakout operates from 1.65V to 5.5V
Type · powerVoltage · 1.65V to 5.5V
GND
common ground for main bus, Qwiic connectors, and header
Type · groundVoltage · 0V
SDA
main upstream I2C serial-data line into the mux; product page describes one main I2C port controlling eight channels
Type · i2c dataVoltage · logic level follows VCC, 1.65V to 5.5V operating range
SCL
main upstream I2C serial-clock line into the mux; product page describes routing future I2C communication to the selected channel
Type · i2c clockVoltage · logic level follows VCC, 1.65V to 5.5V operating range
A0
TCA9548A I2C address-select input; SparkFun documents three ADR solder jumpers for eight configurable addresses

Start wiring

I2C · SPI · 1.65V to 5.5V · 0V

Confirm the data interface matches your host board.

Module pins: VCC, GND, SDA, SCL. Schematik maps them to your board in the app.

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Position

Type

Function

Voltage

VCC

power

main I2C/Qwiic bus supply for the TCA9548A mux breakout; SparkFun says the breakout operates from 1.65V to 5.5V

1.65V to 5.5V

GND

ground

common ground for main bus, Qwiic connectors, and header

SDA

i2c data

main upstream I2C serial-data line into the mux; product page describes one main I2C port controlling eight channels

logic level follows VCC, 1.65V to 5.5V operating range

SCL

i2c clock

main upstream I2C serial-clock line into the mux; product page describes routing future I2C communication to the selected channel

logic level follows VCC, 1.65V to 5.5V operating range

address select

TCA9548A I2C address-select input; SparkFun documents three ADR solder jumpers for eight configurable addresses

logic level follows VCC

address select

TCA9548A I2C address-select input; SparkFun documents three ADR solder jumpers for eight configurable addresses

logic level follows VCC

address select

TCA9548A I2C address-select input; SparkFun documents three ADR solder jumpers for eight configurable addresses

logic level follows VCC

RST

digital input

TCA9548A reset input exposed on the breakout schematic

logic level follows VCC

SD0

channel-0-data

i2c data

multiplexed downstream I2C data line for channel 0; SparkFun says the board provides one Qwiic connector for each of eight multiplexed channels

logic level follows VCC

SC0

channel-0-clock

i2c clock

multiplexed downstream I2C clock line for channel 0; SparkFun says the board provides one Qwiic connector for each of eight multiplexed channels

logic level follows VCC

SD1

channel-1-data

i2c data

multiplexed downstream I2C data line for channel 1; SparkFun says the board provides one Qwiic connector for each of eight multiplexed channels

logic level follows VCC

SC1

channel-1-clock

i2c clock

multiplexed downstream I2C clock line for channel 1; SparkFun says the board provides one Qwiic connector for each of eight multiplexed channels

logic level follows VCC

SD2

channel-2-data

i2c data

multiplexed downstream I2C data line for channel 2; SparkFun says the board provides one Qwiic connector for each of eight multiplexed channels

logic level follows VCC

SC2

channel-2-clock

i2c clock

multiplexed downstream I2C clock line for channel 2; SparkFun says the board provides one Qwiic connector for each of eight multiplexed channels

logic level follows VCC

SD3

channel-3-data

i2c data

multiplexed downstream I2C data line for channel 3; SparkFun says the board provides one Qwiic connector for each of eight multiplexed channels

logic level follows VCC

SC3

channel-3-clock

i2c clock

multiplexed downstream I2C clock line for channel 3; SparkFun says the board provides one Qwiic connector for each of eight multiplexed channels

logic level follows VCC

SD4

channel-4-data

i2c data

multiplexed downstream I2C data line for channel 4; SparkFun says the board provides one Qwiic connector for each of eight multiplexed channels

logic level follows VCC

SC4

channel-4-clock

i2c clock

multiplexed downstream I2C clock line for channel 4; SparkFun says the board provides one Qwiic connector for each of eight multiplexed channels

logic level follows VCC

SD5

channel-5-data

i2c data

multiplexed downstream I2C data line for channel 5; SparkFun says the board provides one Qwiic connector for each of eight multiplexed channels

logic level follows VCC

SC5

channel-5-clock

i2c clock

multiplexed downstream I2C clock line for channel 5; SparkFun says the board provides one Qwiic connector for each of eight multiplexed channels

logic level follows VCC

SD6

channel-6-data

i2c data

multiplexed downstream I2C data line for channel 6; SparkFun says the board provides one Qwiic connector for each of eight multiplexed channels

logic level follows VCC

SC6

channel-6-clock

i2c clock

multiplexed downstream I2C clock line for channel 6; SparkFun says the board provides one Qwiic connector for each of eight multiplexed channels

logic level follows VCC

SD7

channel-7-data

i2c data

multiplexed downstream I2C data line for channel 7; SparkFun says the board provides one Qwiic connector for each of eight multiplexed channels

logic level follows VCC

SC7

channel-7-clock

i2c clock

multiplexed downstream I2C clock line for channel 7; SparkFun says the board provides one Qwiic connector for each of eight multiplexed channels

logic level follows VCC

Pinout

Start wiring

Connectors

Displays

Air quality

MCUs and boards