Microchip Technology MCP23017-E/SS

The MCP23017-E/SS is a robust I/O expander from Microchip Technology that offers an easy way to add more I/O ports to your microcontroller-based projects. This 16-bit expander uses the two-wire I²C bus and serial interface to provide 16 additional ports. It is housed in a SSOP-28 (Shrink Small Outline Package) which is suitable for space-constrained applications.

Key Features

• 16-Bit I/O Expander: Offers 16 additional ports, which can be individually set to input or output.
• I²C Interface: Utilizes a standard I²C serial interface for easy communication with most microcontrollers.
• High-Speed I²C Interface: Supports 100 kHz, 400 kHz, and 1.7 MHz I²C speeds.
• Multiple Addressing Options: Features hardware address pins to allow up to eight devices on the same bus.
• Interrupt Output: Includes an interrupt output pin that can be configured to reflect the interrupt status from any of the input pins.
• Configurable Polarity: Input polarity inversion register to configure the polarity of the input port data.
• External Reset Input: A hardware reset pin (RESET) initiates a power-on reset.
• Operating Voltage: Can be powered by a 1.8V to 5.5V supply voltage, making it suitable for both 5V and 3.3V systems.

Applications

The MCP23017-E/SS is versatile and can be used in a variety of applications, including:

• Expanding I/O ports for microcontroller applications
• LED displays and keypads
• Industrial control systems
• Home automation systems
• Embedded systems

Conclusion

Whether you are a hobbyist looking to experiment with more I/Os or a professional developing a complex system needing additional ports, the MCP23017-E/SS from Microchip Technology is an excellent choice. Its small form factor, ease of use, and compatibility with I²C make it a highly valuable addition to any project that requires expanded I/O capabilities.