Microchip Technology's MCP23008-E/SS

The MCP23008-E/SS is a highly versatile 8-bit I/O expander from the industry-leading manufacturer, Microchip Technology. This robust component is designed to provide additional I/O capabilities to a microcontroller via the two-wire I²C-compatible serial interface. The SS variant of this product comes in a 20-lead SSOP (Shrink Small Outline Package) which is ideal for space-constrained applications.

The MCP23008-E/SS operates over an extended temperature range, making it suitable for industrial-grade applications. Its operating voltage ranges from 2.7V to 5.5V, ensuring compatibility with both 3.3V and 5V logic levels, thus providing a flexible solution for various design requirements. The device includes high-current sink/source capability up to 25 mA, allowing direct drive of LEDs and other devices.

Key features of the MCP23008-E/SS include:

• 8-bit remote I/O expander for I²C bus protocol
• Three hardware address pins to allow up to eight devices on the bus
• Configurable interrupt output pins
• Sequential read/write capabilities
• Internal power-on reset
• Polarity inversion register to configure the polarity of the input port data

This I/O expander is perfect for applications where additional I/Os are needed. It is commonly used in automotive, industrial, consumer, and computing applications. The MCP23008-E/SS helps to reduce the number of pins on microcontrollers, saving PCB space and reducing the complexity of your circuitry.

The device also features built-in input polarity inversion, a feature that greatly simplifies the interface with external components. Additionally, the interrupt-on-change feature ensures that the host microcontroller is alerted on any input change without the need to continuously poll the expander, thus saving valuable processor time and reducing power consumption.

In summary, the MCP23008-E/SS from Microchip Technology is a compact, feature-rich I/O expander that provides a simple, cost-effective solution for expanding the I/O capabilities of any microcontroller with an I²C interface.