MCP23009-E/SS

Product Overview

Category

The MCP23009-E/SS belongs to the category of integrated circuits (ICs) and specifically falls under the family of I/O expanders.

Use

This product is primarily used for expanding the input/output (I/O) capabilities of microcontrollers or other digital devices. It provides additional general-purpose input/output pins, allowing users to connect more peripheral devices or sensors.

Characteristics

• Low-power consumption
• 2-wire serial interface (I2C compatible)
• 8-bit remote I/O port
• Configurable interrupt output pin
• High-speed I2C interface (up to 1.7 MHz)
• Wide operating voltage range (1.8V to 5.5V)

Package

The MCP23009-E/SS is available in a small surface mount package known as SSOP (Shrink Small Outline Package). This package offers compactness and ease of integration into various electronic designs.

Essence

The essence of the MCP23009-E/SS lies in its ability to provide additional I/O pins, enabling greater flexibility and functionality in electronic systems.

Packaging/Quantity

This product is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier or manufacturer.

Specifications

• Operating Voltage: 1.8V to 5.5V
• Number of I/O Pins: 8
• Maximum I2C Bus Frequency: 1.7 MHz
• Interrupt Output Pin: Configurable
• Operating Temperature Range: -40°C to +85°C
• Package Type: SSOP

Detailed Pin Configuration

The MCP23009-E/SS features a total of 20 pins, each serving a specific purpose. The detailed pin configuration is as follows:

1. VDD - Power supply voltage
2. VSS - Ground reference
3. SDA - Serial data input/output pin (I2C)
4. SCL - Serial clock input pin (I2C)
5. A0 - Address selection bit 0
6. A1 - Address selection bit 1
7. A2 - Address selection bit 2
8. RESET - Reset input pin
9. INT - Interrupt output pin
10. GPA0 - General-purpose I/O pin 0
11. GPA1 - General-purpose I/O pin 1
12. GPA2 - General-purpose I/O pin 2
13. GPA3 - General-purpose I/O pin 3
14. GPA4 - General-purpose I/O pin 4
15. GPA5 - General-purpose I/O pin 5
16. GPA6 - General-purpose I/O pin 6
17. GPA7 - General-purpose I/O pin 7
18. NC - No connection
19. NC - No connection
20. NC - No connection

Functional Features

• Bidirectional I/O pins
• Individual configuration for each I/O pin (input or output)
• Pull-up resistors for input pins
• Interrupt-on-change feature for selected pins
• Address selection for multiple devices on the same bus

Advantages and Disadvantages

Advantages

• Low power consumption makes it suitable for battery-powered applications
• Compact SSOP package allows for space-efficient designs
• Wide operating voltage range enables compatibility with various systems
• Configurable interrupt output pin enhances system responsiveness

Disadvantages

• Limited number of I/O pins (8) may not be sufficient for complex projects requiring numerous connections
• Lack of built-in protection features against overvoltage or electrostatic discharge (ESD)

Working Principles

The MCP23009-E/SS communicates with a microcontroller or host device through the I2C bus. It acts as an I/O expander, providing additional pins that can be configured as inputs or outputs. The microcontroller sends commands and data to the MCP23009-E/SS via the I2C interface, controlling the state of each I/O pin.

Detailed Application Field Plans

The MCP23009-E/SS finds applications in various fields, including but not limited to:

1. Home automation systems: Expanding the I/O capabilities of control units for lighting, temperature, and security systems.
2. Industrial automation: Adding more I/O pins to PLCs (Programmable Logic Controllers) for controlling machinery and monitoring sensors.
3. Robotics: Enabling connectivity with multiple sensors, actuators, and peripheral devices in robotic systems.
4. IoT (Internet of Things): Integrating the MCP23009-E/SS into IoT devices to enhance their input/output capabilities.

Detailed and Complete Alternative Models

1. MCP23008-E/SS: Similar to the MCP23009-E/SS, but with 8 I/O pins instead of 8.
2. MCP23017-E/SS: Offers 16 I/O pins