PCF8575 - GPIO pin expander - I2C - STEMMA QT / Qwiic - Adafruit 5611

Adafruit pin expander equipped with PCF8575 chip. It has as many as 16 pins of GPIO inputs / outputs , thanks to which it increases the design possibilities of the modules used. It communicates using the I2C bus, has 3 configurable interface addresses. On the board there are two STEMMA QT / Qwiic connectors and soldering pads to which the goldpin strip included in the set should be soldered.

PCF8575 - GPIO pin expander - I2C - STEMMA QT / Qwiic - Adafruit 5611.

Components included in the set.

• Multiple I/O mode - thanks to 3 address pins, you can get up to 8 outputs on one bus, which gives a total of 8 x 16 = 128 GPIOs on one I2C bus
• The module can be programmed using Arduino and CircuitPython - the manufacturer provides libraries and sample program codes
• The board has STEMMA QT / Qwiic connectors that allow for quick prototyping of systems without the need to solder the connector

• PCF8575 - GPIO pins expander - I2C - STEMMA QT / Qwiic - 1 piece
• Goldpin strip 1x16 pin - raster 2.54 mm - 2 pieces

The expander is equipped with two STEMMA QT connectors, located on the edges of the board. This standard increases prototyping capabilities, significantly speeds up the process of connecting with development boards and a wide range of other sensors. All this is done without the need for soldering and only with the use of a suitable cable.

• VIN - 3V / 5V DC power pin
• GND - system ground
• SCL - clock line of the I2C bus
• SDA - data line of the I2C bus
• P0 - P8 - I/O pins
• 10 - 15 - I/O pins

An example of connecting the expander with Raspberry Pi (not included).

PCF8575 - pin expander extends the board's capabilities by 16 GPIOs.

• Type: GPIO pin expander
• Built-in chip: PCF8575
• Number of I/Os: 16
• Communication interface: I2C bus
• Interface address:
  • default: 0x20
  • configurable: from 0x20 to 0x27
• Supply voltage: 3V / 5V DC
• Leads:
  • STEMMA QT/Qwiic connectors
  • soldering pads (goldpin connectors for self-soldering are included)
• Module dimensions: 40.8 x 17.7 x 4.5 mm
• Weight: 2.6g

• Manufacturer's website: Adafruit 5611
• User Guide