MCP23016T-I/SO

I/o Expanders Overview

The MCP23016T-I/SO is a 16-bit I/O expander featuring an I2C interface, designed for Microchip Technology applications. It operates within a supply voltage range of 2.0V to 5.5V and supports clock frequencies up to 400 kHz. The device provides 16 bidirectional I/O pins that default to inputs, with individual configuration capabilities. It includes an open-drain interrupt output triggered by input state changes and utilizes three hardware address pins (A0-A2) to support up to eight devices on a single bus. The component is housed in a 28-pin SOIC package and functions reliably across an industrial temperature range of -40°C to +85°C.

I/o Expanders Feature Summary

• Provides 16 remote bidirectional I/O ports with high-current drive capability per pin.
• Features an open-drain interrupt output activated upon input state changes, capturing port values.
• Supports multiple devices on the same I2C bus through three configurable hardware address pins.

I/o Expanders Applications

• ACPI control systems
• Power switch management
• Sensor interface expansion
• Push button scanning arrays

I/o Expanders Procurement Notes

Verify the specific suffix 'I' confirms the industrial temperature rating (-40°C to +85°C). Confirm the 'SO' designation matches the required 28-pin SOIC package dimensions. Ensure the 'T' indicates tape-and-reel packaging if automated assembly is planned. Cross-reference the datasheet revision DS20090C for accurate electrical specifications before finalizing orders.

I/o Expanders Selection Notes

Select this component when expanding GPIO capacity via I2C is required without SPI complexity. It is suitable for designs needing interrupt-driven input monitoring rather than continuous polling. Consider the external RC circuit requirement for the CLK pin when designing the schematic. Verify that the host microcontroller supports the necessary I2C protocol speeds and address configurations.

I/o Expanders Part Context

This part belongs to the MCP23016 family of 16-bit I/O expanders from Microchip Technology. It serves as a bridge between I2C buses and parallel digital I/O lines. The device simplifies system design by reducing the number of direct connections required between the main processor and peripheral components, optimizing PCB space and pin usage.

I/o Expanders Replacement Considerations

Direct functional replacements include other MCP23016 variants with different packages or temperature grades. For SPI interfaces, consider the MCP23S16. For higher pin counts, evaluate the MCP23017 or MCP23S17 families, noting differences in interface type and register mapping.