MCP23008T-E/ML

Overview

The MCP23008T-E/ML is an 8-bit I/O expander featuring an I2C serial interface, manufactured by Microchip Technology. It operates within a supply voltage range of 1.8V to 5.5V and supports clock frequencies up to 1.7 MHz. The device provides eight bidirectional general-purpose I/O pins (GP0-GP7) with configurable interrupt-on-change capabilities. It utilizes three hardware address pins (A0-A2) to allow up to eight devices on the bus. The component is housed in a 20-pin QFN package and functions across a temperature range from -40°C to +125°C.

Feature Summary

• Supports high-speed I2C communication with multiple frequency options
• Features configurable interrupt output for efficient host monitoring
• Includes internal weak pull-up resistors for input configuration
• Provides polarity inversion registers for input data adjustment

Applications

• Remote I/O expansion for microcontroller systems
• Embedded control interfaces requiring additional digital inputs or outputs
• Industrial automation panels with limited controller pins

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type and temperature grade. Ensure the procurement channel sources genuine components directly from authorized distributors or the manufacturer to prevent counterfeit risks. Confirm RoHS compliance status matches project requirements before finalizing orders.

Selection Notes

Select this component when an I2C interface is required for expanding GPIO lines. Compare against the MCP23S08 if SPI connectivity is preferred instead. Consider the QFN-20 package constraints regarding PCB layout and thermal dissipation. Verify that the system voltage levels align with the 1.8V to 5.5V operating range.

Part Context

This part belongs to the MCP23X08 family of 8-bit I/O expanders. It shares functional similarities with the MCP23017 but offers fewer pins. The 'T' indicates tape and reel packaging, while '/ML' specifies the QFN-20 package variant. The '-E' suffix denotes the extended industrial temperature range capability.

Replacement Considerations

The MCP23008T-E/SO serves as a pin-compatible alternative using a SOIC-28 package. The MCP23008T-E/SSVAO is another variant available in SSOP-20 packaging. Verify register compatibility and physical footprint differences before substituting.