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MCP23009-E/MG

MCP23009-E/MG Description

The MCP23009-E/MG from Microchip Technology is a high-performance 8-bit I/O expander designed for I²C bus applications. Operating within a 1.8V to 5.5V supply range, this device is ideal for low-power and mixed-voltage systems. It features open-drain outputs with a 25mA source/sink current capability, making it suitable for driving LEDs, relays, or other peripherals. With a 3.4MHz clock frequency, it ensures fast and reliable communication in embedded systems. The 16QFN package offers a compact footprint, ideal for space-constrained designs.

MCP23009-E/MG Features

• I²C Interface: Simplifies integration with microcontrollers and reduces GPIO usage.
• 8 Programmable I/O Pins: Configurable as inputs or outputs with interrupt-on-change functionality for efficient event monitoring.
• Power-On Reset (POR): Ensures reliable startup conditions.
• Open-Drain Outputs: Supports flexible voltage-level translation and wired-AND configurations.
• Wide Voltage Range (1.8V–5.5V): Compatible with 3.3V and 5V systems.
• Low-Power Design: Ideal for battery-operated devices.
• RoHS3 Compliant & REACH Unaffected: Meets environmental and regulatory standards.

MCP23009-E/MG Applications

The MCP23009-E/MG excels in applications requiring GPIO expansion or interrupt-driven I/O management, such as:

• Industrial Control Systems: For sensor interfacing and actuator control.
• Consumer Electronics: Keypad scanning, LED driving, or display control.
• IoT Devices: Low-power sensor hubs with interrupt-based wake-up.
• Automotive Systems: Interior lighting or switch monitoring.
• Embedded Systems: Reducing MCU pin count while adding flexibility.

Conclusion of MCP23009-E/MG

The MCP23009-E/MG stands out as a versatile, low-power I/O expander with robust performance and ease of integration. Its I²C interface, interrupt support, and wide voltage range make it superior to basic GPIO expanders, particularly in power-sensitive or mixed-voltage designs. Whether for industrial automation, IoT, or consumer electronics, this device delivers reliability and scalability in a compact package.