Microchip Technology's MCP23017T-E/ML I/O Expander

The MCP23017T-E/ML is a robust 16-bit input/output (I/O) expander from Microchip Technology that provides an easy way to add additional I/O ports to a microcontroller or microprocessor-based system. With its I2C interface, this device allows for seamless communication and I/O expansion over a simple two-wire serial connection, making it an ideal solution for applications where board space is at a premium and additional GPIOs are required.

The MCP23017T-E/ML operates over a wide voltage range of 1.8V to 5.5V, ensuring compatibility with both low-voltage and standard 5V logic levels. This makes it suitable for interfacing with a broad range of devices in various applications, from consumer electronics to industrial control systems.

This I/O expander comes in a 28-lead QFN package, offering a compact footprint that is beneficial for space-constrained designs. It features 16 I/O ports that can be individually configured as either inputs or outputs, providing the designer with flexibility in controlling various peripherals or capturing input signals.

Additionally, the MCP23017T-E/ML supports interrupt-on-change functionality, which can be configured for either input pins or for the entire port. This feature allows the host microcontroller to be notified of any input state changes without the need to continuously poll the I/O expander, thus reducing the overall system power consumption and freeing up processor bandwidth for other tasks.

The device also includes high-level features such as internal pull-up resistors, input polarity inversion, and register banking, which simplify software development and integration. With its robust set of features and capabilities, the MCP23017T-E/ML is a versatile component that addresses the need for additional I/Os in a wide array of electronic designs.

Whether you're designing a complex human interface, expanding the capabilities of a microcontroller-based project, or simply needing more I/O pins for your design, the MCP23017T-E/ML from Microchip Technology offers a reliable and efficient solution.