MCP23017T-E/SO

I/o Expanders Overview

The MCP23017T-E/SO is a 16-bit I/O expander featuring an I2C interface 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 16 bidirectional I/O pins with configurable interrupt outputs (INTA/INTB) and internal weak pull-ups. Maximum output current per pin is 25mA, with standby current at 1µA max. Operating temperature spans -40°C to +125°C.

I/o Expanders Feature Summary

• Supports up to eight devices on the bus via three hardware address pins
• Configurable interrupt outputs for active-high, active-low, or open-drain modes
• Includes polarity inversion register for input port data configuration
• Features external reset input and low standby current consumption

I/o Expanders Applications

• I2C bus peripheral expansion
• Remote bidirectional I/O port control
• Signal processing systems

I/o Expanders Procurement Notes

Verify the suffix 'E' indicates extended temperature range (-40°C to +125°C). Confirm 'SO' denotes the 28-pin wide SOIC package. Ensure the datasheet revision matches the required specifications. Check RoHS compliance status as indicated in official documentation.

I/o Expanders Selection Notes

Select this model for applications requiring I2C connectivity rather than SPI. Verify that the system voltage falls within the 1.8V to 5.5V range. Consider the 28-pin SOIC footprint for PCB layout. Ensure the host controller supports the required I2C speed modes up to 1.7MHz.

I/o Expanders Part Context

This component belongs to the MCP23X17 family, which includes both I2C (MCP23017) and SPI (MCP23S17) variants. The T-E/SO designation specifies the tape-and-reel packaging, extended temperature grade, and SOIC package type. It shares functional registers with other family members but differs in serial interface protocol.

I/o Expanders Replacement Considerations

MCP23017-E/SO is the non-tape equivalent. MCP23S17T-E/SO offers identical functionality with an SPI interface instead of I2C. Other packages like SSOP or QFN are available within the same family.