MCP23017-E/SO

I/o Expanders Overview

The MCP23017-E/SO is a 16-bit I/O expander featuring an I2C interface, housed in a 28-pin SOIC package. It operates within a supply voltage range of 1.8V to 5.5V and supports clock frequencies up to 1.7MHz. The device provides two 8-bit ports (PORTA and PORTB) with configurable input/output directions, interrupt outputs, and internal pull-up resistors. It accommodates up to eight devices on the bus via hardware address pins and functions reliably across temperatures from -40°C to +125°C.

I/o Expanders Feature Summary

• Provides 16-bit remote bidirectional I/O expansion through a high-speed I2C interface.
• Features configurable interrupt output pins that support active-high, active-low, or open-drain modes.
• Includes three hardware address pins allowing up to eight devices to operate on a single bus.
• Supports external reset input and low standby current consumption.

I/o Expanders Applications

• I2C bus applications requiring general-purpose parallel I/O expansion
• Embedded systems needing additional GPIO resources for sensors or actuators
• Industrial control interfaces utilizing serial communication protocols

I/o Expanders Procurement Notes

Verify the specific suffix 'E' indicates the extended temperature grade (-40°C to +125°C) and 'SO' denotes the wide SOIC-28 package. Confirm RoHS compliance status and moisture sensitivity level requirements during storage and handling. Ensure the ordering information matches the exact datasheet revision DS20001952D to guarantee functional compatibility.

I/o Expanders Selection Notes

Select this model when an I2C interface is required rather than SPI; the MCP23S17 variant serves the latter purpose. Consider the 28-pin SOIC package dimensions against available PCB space. Evaluate the need for interrupt capabilities and the maximum clock frequency of 1.7MHz relative to the host controller's I2C bus speed limitations.

I/o Expanders Part Context

This component belongs to the MCP23X17 family, which includes both I2C (MCP23017) and SPI (MCP23S17) variants. The 'E' suffix specifies the industrial temperature range extension compared to commercial grades. The 'SO' suffix identifies the specific 28-pin Wide Small Outline Integrated Circuit package type used for surface mount assembly.

I/o Expanders Replacement Considerations

The MCP23S17 offers identical functionality but utilizes an SPI interface instead of I2C. Other Microchip I/O expanders may provide different pin counts or interface types. Verify register compatibility and electrical characteristics before substituting with generic equivalents.