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Main > Sensor modules > Communication  > Adafruit PCA9546 4-Channel StemmaQT/Qwiic/EasyC I2C Multiplexer

Adafruit PCA9546 4-Channel StemmaQT/Qwiic/EasyC I2C Multiplexer

Finally, a way to get up to 4 same-address I2C devices hooked up to one microcontroller - this multiplexer acts as a gatekeeper, shuttling the commands to the selected I2C port with your command. Using it is fairly straight-forward: the multiplexer itself is on I2C address 0x70 (but can be adjusted from 0x70 to 0x77 using jumpers on the back) and you simply write a single byte with the desired multiplexed output number to that port.

Product Id: 12648
Your Price: €6.40
Shipping Weight: 15 g
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Brand: Adafruit
This board allows you to use I2C over long cables - up to 3m @ 400 KHz and up to 30m @ 100 KHz via Ethernet cable! Just connect it to your I2C bus at the beginning of the chain, no special firmware, software, or configuration required. Runs with any bus voltage, from 1.6V to 5.5V and up to 400 KHz SCL speed, with cables up to 4000pF.
ID: 12294   Your Price: €15.00
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On one side is 5V-safe power and logic input. In the middle is a 3.3V regulator that can provide 500mA plus level shifting circuitry. On the opposite side is the same I2C traffic but now safely shifted down to 3.3V to allow usage with the vast number of sensors and devices that are not 5V safe.
ID: 12293   Your Price: €5.50
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This board comes pre-programmed with seesaw peripheral code that will let it act as an "I2C to something" converter. It has 12x GPIO, 9x 10-bit ADC, 5x 8-bit PWM, 1x NeoPixel output, 1x interrupt, 1x LED, 127 byte EEPROM and two StemmaQT/Qwiic/EasyC I2C connectors. Works with 2-5 V power/logic.
ID: 12647   Your Price: €7.90
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easyC is a system for faster prototyping and easy connection between the components. However, some of the components have only one easyC port or you just want your cable managmenet made better. What to do in those cases? The easyC hub comes to the rescue! It has six connectors so you can easily expand your circuit. EasyC is fully compatible with Qwiic/StemmaQT.
ID: 12472   Your Price: €1.50
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This one is an adapter with easyC connectors for all older boards without easyC connectors onboard.
ID: 11999   Your Price: €0.93
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easyC is the system for simple connection of microcontroller boards, sensors, and actuators, based on the I2C communication and compatible with SparkFun's Qwiic system. This cable has easyC connectors on both ends, and it's 6 cm long.
ID: 11732   Your Price: €1.00
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easyC is the system for simple connection of microcontroller boards, sensors, and actuators, based on the I2C communication and compatible with SparkFun's Qwiic system. This cable has easyC connectors on both ends, and it's 10 cm long.
ID: 11733   Your Price: €1.20
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easyC is the system for simple connection of microcontroller boards, sensors, and actuators, based on the I2C communication and compatible with SparkFun's Qwiic system. This cable has easyC connectors on both ends, and it's 20 cm long.
ID: 11734   Your Price: €1.50
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This easyC cable exposes all the pins on the easyC connector. Using this cable, any easyC board can be connected to an experimental board or vice versa. Wires: bllack GND, red 3.3V, blue SDA, yellow SCL.
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easyC is the system for simple connection of microcontroller boards, sensors, and actuators, based on the I2C communication and compatible with SparkFun's Qwiic system. This cable has easyC connectors on both ends, and it's 50 cm long.
ID: 11735   Your Price: €1.75
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easyC is the system for simple connection of microcontroller boards, sensors, and actuators, based on the I2C communication and compatible with SparkFun's Qwiic system. This cable has easyC connectors on both ends, and it's 100 cm long.
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