MCP23008-E/ML

Product Overview

• Category: Integrated Circuit (IC)
• Use: General Purpose Input/Output (GPIO) Expander
• Characteristics:
  • Low-power, 8-bit I/O expander
  • Compatible with I2C interface
  • Can be used to increase the number of available GPIO pins in a microcontroller
• Package: ML (Small Outline IC)
• Essence: Expansion of GPIO capabilities
• Packaging/Quantity: Available in tape and reel packaging, quantity depends on supplier

Specifications

• Number of I/O Pins: 8
• Supply Voltage Range: 1.8V to 5.5V
• Maximum I/O Sink Current: 25mA
• Maximum I/O Source Current: 25mA
• Operating Temperature Range: -40°C to +85°C
• Communication Interface: I2C
• Address Selection: Three hardware address pins for up to 8 devices on the same bus

Detailed Pin Configuration

The MCP23008-E/ML has a total of 20 pins. The pin configuration is as follows:

1. VDD - Power supply voltage
2. VSS - Ground
3. SDA - Serial Data Line (I2C)
4. SCL - Serial Clock Line (I2C)
5. INT - Interrupt output
6. A2 - Hardware address selection bit 2
7. A1 - Hardware address selection bit 1
8. A0 - Hardware address selection bit 0
9. GP0 - General Purpose I/O pin 0
10. GP1 - General Purpose I/O pin 1
11. GP2 - General Purpose I/O pin 2
12. GP3 - General Purpose I/O pin 3
13. GP4 - General Purpose I/O pin 4
14. GP5 - General Purpose I/O pin 5
15. GP6 - General Purpose I/O pin 6
16. GP7 - General Purpose I/O pin 7
17. RESET - Reset input
18. NC - No connection
19. NC - No connection
20. NC - No connection

Functional Features

• Expand the number of available GPIO pins in a microcontroller
• Can be used as inputs or outputs
• Configurable interrupt output for pin change detection
• Supports hardware address selection for multiple devices on the same bus
• Low-power consumption
• Compatible with I2C interface

Advantages and Disadvantages

Advantages: - Provides additional GPIO pins, increasing flexibility in microcontroller applications - Easy to use and integrate into existing systems - Low-power operation helps conserve energy - Supports multiple devices on the same bus

Disadvantages: - Limited to 8-bit I/O expansion - Requires I2C communication interface support in the microcontroller

Working Principles

The MCP23008-E/ML is an I/O expander that communicates with a microcontroller using the I2C interface. It allows the microcontroller to control and monitor up to 8 additional GPIO pins. The device can be configured as inputs or outputs based on the application requirements. It supports interrupt functionality for pin change detection, allowing the microcontroller to respond to specific events.

Detailed Application Field Plans

The MCP23008-E/ML can be used in various applications where additional GPIO pins are required. Some potential application fields include:

1. Home automation systems: Control and monitor various devices such as lights, sensors, and actuators.
2. Industrial automation: Expand the I/O capabilities of programmable logic controllers (PLCs) for controlling machinery and equipment.
3. Internet of Things (IoT): Interface with sensors and actuators in IoT devices to enable data collection and control.
4. Robotics: Control and monitor various components in robotic systems, such as motors, sensors, and communication modules.

Detailed and Complete Alternative Models

1. MCP23017-E/ML: 16-bit I/O expander with similar features to the MCP23008-E/ML.
2. PCF8574T: 8-bit I/O expander with I2C interface.
3. MAX7313: 16-bit I/O expander with serial interface.

These alternative models offer similar functionality and can be considered based on specific project requirements.

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