MCP23017-E/SO

Product Overview

• Category: Integrated Circuit (IC)
• Use: General-purpose input/output (GPIO) expander
• Characteristics:
  • High-performance, 16-bit I/O expander
  • Provides additional GPIO pins for microcontrollers
  • Supports both input and output operations
  • Can be controlled via I2C interface
• Package: Small Outline (SO)
• Essence: Expansion of digital I/O capabilities
• Packaging/Quantity: Available in tape and reel packaging, quantity varies based on supplier

Specifications

• Supply Voltage: 1.8V to 5.5V
• Number of I/O Pins: 16
• I2C Bus Speed: Up to 1.7 MHz
• Interrupt Output Pins: 2
• Operating Temperature Range: -40°C to +85°C
• RoHS Compliant: Yes

Pin Configuration

The MCP23017-E/SO has a total of 28 pins. The pin configuration is as follows:

1. GPA0 - General Purpose I/O A0
2. GPA1 - General Purpose I/O A1
3. GPA2 - General Purpose I/O A2
4. GPA3 - General Purpose I/O A3
5. GPA4 - General Purpose I/O A4
6. GPA5 - General Purpose I/O A5
7. GPA6 - General Purpose I/O A6
8. GPA7 - General Purpose I/O A7
9. VSS - Ground
10. VDD - Power Supply
11. INTA - Interrupt A Output
12. INTB - Interrupt B Output
13. RESET - Reset Input
14. SDA - I2C Serial Data
15. SCL - I2C Serial Clock
16. GPB7 - General Purpose I/O B7
17. GPB6 - General Purpose I/O B6
18. GPB5 - General Purpose I/O B5
19. GPB4 - General Purpose I/O B4
20. GPB3 - General Purpose I/O B3
21. GPB2 - General Purpose I/O B2
22. GPB1 - General Purpose I/O B1
23. GPB0 - General Purpose I/O B0
24. A2 - Address Input 2
25. A1 - Address Input 1
26. A0 - Address Input 0
27. NC - No Connection
28. VSS - Ground

Functional Features

• Provides additional digital I/O pins for microcontrollers with limited GPIO capabilities
• Can be controlled using the I2C interface, allowing easy integration into existing systems
• Supports both input and output operations on each pin
• Interrupt outputs allow for efficient event-driven programming
• Configurable pull-up resistors on each pin for added flexibility

Advantages and Disadvantages

Advantages: - Expands the number of available GPIO pins, reducing the need for additional microcontroller units - Easy to integrate into existing systems using the I2C interface - Configurable pull-up resistors provide flexibility in different applications

Disadvantages: - Limited to 16 I/O pins, may not be sufficient for complex projects requiring a large number of digital inputs/outputs - Requires knowledge of I2C communication protocol for proper usage

Working Principles

The MCP23017-E/SO is an I/O expander that communicates with a microcontroller using the I2C bus. It acts as a bridge between the microcontroller and external devices, providing additional digital I/O pins. The microcontroller sends commands to the MCP23017-E/SO via the I2C interface to set the desired pin configurations (input or output) and read/write data to the pins. The MCP23017-E/SO then responds accordingly, allowing the microcontroller to control external devices connected to its GPIO pins.

Detailed Application Field Plans

The MCP23017-E/SO can be used in various applications, including but not limited to: - Home automation systems - Industrial control systems - Robotics - Internet of Things (IoT) devices - Sensor interfaces - Keypad/keypad matrix expansion

Alternative Models

• MCP23S17-E/SO: Similar to MCP23017-E/SO, but communicates using SPI interface instead of I2C
• MCP23017-E/SP: DIP package version of MCP23017-E/SO for through-hole mounting
• MCP23018-E/SO: 8-bit version of MCP23017-E/SO with half the number of I/O pins

These alternative models offer similar functionality but may have different pin configurations or communication interfaces, providing options based on specific project requirements.

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