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It is possible for a microcontroller or other digital device to have more input/output pins available by using a GPIO (General Purpose Input/Output) expander. This is helpful when connecting several sensors or other components to the microcontroller or when there are only a limited number of pins on the microcontroller that may be used.
A GPIO expander often uses a serial interface, such as I2C, SPI, or UART, to connect to the microcontroller. Each pin on the expander may be set up to be either an input or an output, and the microcontroller can read from or write to these pins as if they were physically connected to it.
Market-available GPIO expanders come in a variety of forms, including breakout boards with integrated GPIO expanders and dedicated ICs (integrated circuits).To meet various applications and manufacturing techniques, these ICs often come in a range of package formats, including surface mount and through-hole.
The I/O capabilities of microcontrollers and other digital devices can be expanded with the help of GPIO expanders, which offer a flexible and affordable option.
Global GPIO expander market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
A PCF8575 I2C 16 GPIO Expander Breakout, a cost-effective 16 channel I2C expander, has been released by Adafruit. In order to increase GPIO versatility, Renesas has introduced the GreenPAK GPIO Expander, which offers flexible signal routing, programmable I/O, and programmable logic.
To assist designers in reducing board space and complexity while streamlining software development and lowering overall system cost, NXP Semiconductors provides flexible general-purpose I/O (GPIO) expanders that provide 4, 8, 16, 24 or 40 general-purpose I/O pins for the CPU over the I2C-bus.
NXP Semiconductors provides flexible general-purpose I/O (GPIO) expanders that give the CPU 4, 8, 16, 24 or 40 general-purpose I/O pins over the I2C-bus to assist designers in minimising board complexity and space requirements while streamlining software development and cutting system costs.
SPI GPIO Expander from Arrow Electronics adds more inputs and outputs (I/O) to a microprocessor.
Based on the Microchip MCP23017, Adafruit has also released the MCP23017 I2C Expander Breakout. The board is made to work seamlessly with STEMMA QT. In comparison to the PCF8575 breakout board, it offers two more ports.
