Microchip Technology MCP23008-E/P
The MCP23008-E/P is a robust 8-bit I/O expander from Microchip Technology, designed to provide additional I/O capabilities to a microcontroller via the two-wire I²C™ bus interface. This versatile component is ideal for applications where additional inputs/outputs are necessary, especially in space-constrained environments where the use of multiple microcontrollers would be impractical or cost-prohibitive.
Encased in a PDIP-18 package, the MCP23008-E/P is easy to integrate into a wide variety of projects, from hobbyist level to professional applications. It operates over a voltage range of 2.7V to 5.5V, making it suitable for interfacing with both 3.3V and 5V logic levels, thus providing the flexibility needed for compatibility with various microcontroller platforms.
Key features of the MCP23008-E/P include:
- Expandability: Users can control up to eight individual GPIO pins through a single I²C bus, and up to eight devices can be connected on the same bus, offering the possibility of controlling up to 64 I/Os.
- Interrupt Output: An interrupt output pin can be configured to alert the host microcontroller of an input change event, reducing the need for constant polling of the I/O expander.
- Input Polarity Inversion: The polarity of the input port data can be inverted, providing additional flexibility in interfacing with external circuits.
- Configurable Input/Output: Each GPIO pin can be individually set as an input or output, allowing for a mix of input and output pins within the same device.
- Internal Power-On Reset: The device includes an internal Power-on Reset (POR) circuit, ensuring that the I/O expander starts in a known state after power-up.
- High-Level Serial Interface: The I²C interface supports standard (100 kHz), fast (400 kHz), and high-speed (up to 1.7 MHz) modes, providing a high level of communication speed flexibility.
Whether you're developing a complex control system or simply need a few extra pins for your microcontroller, the MCP23008-E/P offers a reliable, cost-effective solution. Its ease of use, combined with advanced features, makes it an excellent choice for expanding the capabilities of your next project.
