Lead expander - 8-channel - with I2C multiplexer - PCA9548 - STEMMA QT / Qwiic - Adafruit 5626

Index: ADA-22391
Module with a multiplexer equipped with the PCA9548 chip, which is a replacement for the popular TCA9548A chip. It allows you to connect up to 8 separate I2C digital buses to one microcontroller interface. The I2C bus address occupied by the multiplexer is 0x70 , it can also be configured in the range from 0x70 to 0x77 using jumpers located at the back of the module. The pinouts are STEMMA QT/Qwiic connectors, evenly spaced on both sides of the board.
Lead expander - 8-channel - with I2C multiplexer - PCA9548 - STEMMA QT / Qwiic - Adafruit 5626
€9.90
€8.05 tax excl.
Delivery 4 pcs scheduled for 2024-12-20
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Manufacturer: Adafruit
Compatibility: Arduino Raspberry Pi

Product description: Lead expander - 8-channel - with I2C multiplexer - PCA9548 - STEMMA QT / Qwiic - Adafruit 5626

Module with a multiplexer equipped with the PCA9548 chip, which is a replacement for the popular TCA9548A chip. It allows you to connect up to 8 separate I2C digital buses to one microcontroller interface. The I2C bus address occupied by the multiplexer is 0x70 , it can also be configured in the range from 0x70 to 0x77 using jumpers located at the back of the module. The pinouts are STEMMA QT/Qwiic connectors, evenly spaced on both sides of the board.

8-channel module with I2C multiplexer - PCA9548 - STEMMA QT / Qwiic - Adafruit 5626.

Example connection diagram. The subject of the sale is only the pin expander - Raspberry Pi, cables and peripherals must be purchased separately.

Connection diagram and pin description

The pins of the module are STEMMA QT / Qwiic connectors that allow quick connection to peripheral devices without the need for soldering. Connect the pins according to the relations below:

  • VIN - 3 V power pin (red wire)
  • GND - system ground (black wire)
  • SCL - clock line of the I2C bus (yellow wire)
  • SDA - I2C bus data line (blue wire)

Product compatible with Arduino and Raspberry Pi!

The manufacturer has prepared a user's guide , which contains a detailed description of the pins and sample program code - check it out!

Module technical specification

  • Type: lead expander with multiplexer
  • Built-in chip: PCA9548
  • Number of channels: 8
  • Communication interface: I2C bus
  • Bus address: 0x70, adjustable from 0x70 to 0x77
  • Supply voltage: 3 V to 5 V or 3 V / 500 mA
  • Pins: STEMMA QT/Qwiic connectors
  • Board dimensions: 40.6 x 20.2 x 4.8 mm
  • Weight: 5.1g

Kit contents

  • Lead expander - 8-channel - with I2C multiplexer - PCA9548 - STEMMA QT / Qwiic
  • Goldpin strip 1x6 - raster 2.54 m

Components included in the set.

Components included in the set.

Channels 8
Interface I2C
Sensor - type multiplexer
Package width 5 cm
Package height 4 cm
Package depth 2 cm
Package weight 0.006 kg

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