MCP23017T-E/MLVAO

I/o Expanders Overview

The MCP23017T-E/MLVAO is a 16-bit remote bidirectional I/O port expander featuring an I2C interface. It provides two independent 8-bit ports (PORTA and PORTB) with configurable direction control, interrupt-on-change capabilities, and polarity inversion registers. The device supports three hardware address pins to allow up to eight devices on the bus. Operating voltage ranges from 1.8V to 5.5V, with standby current of 1µA maximum. It utilizes a 28-pin QFN package (6 x 6 mm body). Key electrical parameters include a supply voltage of 1.8V to 5.5V, maximum clock frequency of 1.7 MHz for I2C, operating temperature range of -40°C to +125°C, and ESD protection of 4 kV.

I/o Expanders Feature Summary

• Provides 16-bit general-purpose parallel I/O expansion via a high-speed I2C interface compatible with standard, fast, and high-speed modes.
• Features configurable interrupt output pins that can be set as active-high, active-low, or open-drain, supporting independent or combined operation.

I/o Expanders Applications

• Embedded systems requiring GPIO expansion for microcontrollers with limited I/O resources
• Industrial automation interfaces utilizing I2C communication protocols
• Consumer electronics devices needing additional input/output ports

I/o Expanders Procurement Notes

Verify the specific suffix 'VAO' against official Microchip documentation to confirm any unique manufacturing or compliance attributes not covered by the standard datasheet. Ensure the ordering information matches the exact package type and temperature grade required for your application design specifications.

I/o Expanders Selection Notes

Select this component when an I2C interface is preferred over SPI for I/O expansion. Consider the 28-pin QFN package constraints regarding PCB layout and thermal management. Verify that the system voltage falls within the 1.8V to 5.5V range and that the I2C bus speed requirements do not exceed the specified limits for the chosen voltage condition.

I/o Expanders Part Context

This part belongs to the MCP23X17 family, which includes both I2C (MCP23017) and SPI (MCP23S17) variants. The 'E' indicates an extended temperature range, while 'ML' specifies the QFN package. The 'T' denotes tape and reel packaging, and 'VAO' likely refers to specific vendor or environmental compliance codes defined by Microchip.

I/o Expanders Replacement Considerations

Direct functional replacements within the same family include other MCP23017 variants with different packages such as MCP23017-E/SO or MCP23017-E/SS. Ensure the substitute maintains the I2C interface and QFN package if footprint compatibility is critical.