MCP23016-I/SP

I/o Expanders Overview

The MCP23016-I/SP is a 16-bit I/O expander utilizing an I2C serial interface. It provides 16 bidirectional general-purpose I/O pins, defaulting to inputs upon power-on reset. The device supports a clock frequency up to 400 kHz and operates within a supply voltage range of 2.0 V to 5.5 V. It features high-current drive capability of ±25 mA per I/O pin and includes an open-drain interrupt output for input change detection. Three hardware address pins allow up to eight devices on the same bus. The industrial temperature grade (-I) ensures operation from -40°C to +85°C. It is housed in a 28-pin SPDIP package.

I/o Expanders Feature Summary

• Provides 16-bit remote bidirectional I/O expansion via I2C interface
• Features open-drain interrupt output activated by input state changes
• Includes internal Power-On Reset (POR) circuit with power-up timer
• Supports polarity inversion for input port data configuration

I/o Expanders Applications

• ACPI control and power switch management
• Sensor interface and push button scanning
• LED matrix driving and indicator control

I/o Expanders Procurement Notes

Verify the ordering suffix 'I/SP' corresponds to the Industrial temperature range and SPDIP-28 package. Confirm that the specific revision matches the required datasheet version DS20090C. Ensure compatibility with the target system's I2C voltage levels and clock speed requirements before finalizing procurement.

I/o Expanders Selection Notes

Select this component when a microcontroller requires additional parallel I/O lines accessible via a standard two-wire I2C bus. It is suitable for applications needing individual pin configuration as inputs or outputs. Consider the ±25 mA drive capability for direct load interfacing. Verify that the external RC clock circuit components meet the recommended values for stable internal clock generation.

I/o Expanders Part Context

The MCP23016 belongs to Microchip's family of I2C I/O expanders. Unlike the MCP23017, it lacks built-in pull-ups and requires an external RC circuit for its internal clock generator. The 'I' suffix denotes the industrial temperature range, while 'SP' indicates the 28-pin SPDIP package type. It serves as a cost-effective solution for expanding GPIO capabilities in resource-constrained embedded systems.

I/o Expanders Replacement Considerations

MCP23016T-I/ML: Same functional specifications but in QFN-28 surface-mount package.