MCP23008-E/ML

I/o Expanders Overview

The MCP23008-E/ML is an 8-bit I/O expander featuring an I2C interface, housed in a 20-pin QFN package. It supports clock frequencies of 100 kHz, 400 kHz, and up to 1.7 MHz. The device operates on a supply voltage ranging from 1.8 V to 5.5 V and functions within a temperature range of -40°C to +125°C. It provides eight bidirectional GPIO pins with configurable interrupt outputs and internal weak pull-up resistors.

I/o Expanders Feature Summary

• Provides eight bidirectional general-purpose I/O ports expandable via the I2C bus.
• Features configurable interrupt output logic supporting active-high, active-low, or open-drain modes.
• Includes hardware address pins for multi-device addressing on a single serial bus.

I/o Expanders Applications

• Embedded systems requiring additional digital input/output ports.
• Industrial control panels utilizing I2C communication protocols.
• Smart home automation devices needing GPIO expansion.

I/o Expanders Procurement Notes

Verify the specific suffix 'E/ML' corresponds to the 20-pin QFN package variant rather than other package types like PDIP or SOIC. Confirm that the operating voltage and temperature ranges align with the target application environment before finalizing procurement orders.

I/o Expanders Selection Notes

Select this component when an I2C interface is preferred over SPI for GPIO expansion. Ensure the system design accommodates the three hardware address pins required for unique device identification on the I2C bus compared to the two pins used by the SPI variant.

I/o Expanders Part Context

This part belongs to the MCP23X08 family of 8-bit I/O expanders manufactured by Microchip Technology. It serves as the I2C-specific counterpart to the MCP23S08, which utilizes an SPI interface. Both share similar register architectures and functional capabilities but differ in their serial communication protocols and address pin configurations.

I/o Expanders Replacement Considerations

The MCP23S08 offers identical functionality using an SPI interface instead of I2C. Other compatible parts include the MCP23017 for 16-bit expansion needs. Verify pin compatibility and software driver support when substituting these alternatives.