MCP23017T-E/SO

Introduction

The MCP23017T-E/SO is a versatile and widely used I/O expander integrated circuit that belongs to the family of MCP23XXX devices. This device provides an easy way to increase the I/O capability of a microcontroller or microprocessor, making it suitable for various applications across different industries.

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: I/O Expander
• Characteristics: High-speed I2C interface, 16-bit remote bidirectional I/O port, interrupt output support, cascading capability
• Package: 28-pin Small Outline (SO) package
• Essence: Expand the I/O capability of microcontrollers and microprocessors
• Packaging/Quantity: Available in tape and reel packaging, quantity varies based on supplier

Specifications

• Operating Voltage: 1.8V to 5.5V
• Maximum I/O Voltage: 5.5V
• Maximum Frequency: 1.7 MHz
• Operating Temperature Range: -40°C to +85°C
• I/O Pins: 16
• Interrupt Output: Yes
• I2C Address Selection Pins: Yes

Detailed Pin Configuration

The MCP23017T-E/SO features a 28-pin Small Outline (SO) package with the following pin configuration: 1. A0 - I2C Slave Address Bit 0 2. A1 - I2C Slave Address Bit 1 3. A2 - I2C Slave Address Bit 2 4. Vss - Ground 5. SDA - I2C Serial Data Line 6. SCL - I2C Serial Clock Line 7. RESET - Reset Input 8. GPA0 - General Purpose I/O Port A, Bit 0 9. GPA1 - General Purpose I/O Port A, Bit 1 10. GPA2 - General Purpose I/O Port A, Bit 2 11. GPA3 - General Purpose I/O Port A, Bit 3 12. GPA4 - General Purpose I/O Port A, Bit 4 13. GPA5 - General Purpose I/O Port A, Bit 5 14. GPA6 - General Purpose I/O Port A, Bit 6 15. GPA7 - General Purpose I/O Port A, Bit 7 16. Vdd - Power Supply 17. INTA - Interrupt Output for Port A 18. GPB7 - General Purpose I/O Port B, Bit 7 19. GPB6 - General Purpose I/O Port B, Bit 6 20. GPB5 - General Purpose I/O Port B, Bit 5 21. GPB4 - General Purpose I/O Port B, Bit 4 22. GPB3 - General Purpose I/O Port B, Bit 3 23. GPB2 - General Purpose I/O Port B, Bit 2 24. GPB1 - General Purpose I/O Port B, Bit 1 25. GPB0 - General Purpose I/O Port B, Bit 0 26. INTB - Interrupt Output for Port B 27. I/O Configuration 28. Vss - Ground

Functional Features

• High-Speed I2C Interface: Allows for fast communication with the host microcontroller.
• Remote Bidirectional I/O Ports: Provides 16 I/O pins that can be configured as inputs or outputs.
• Interrupt Output Support: Enables efficient handling of I/O events without continuous polling.
• Cascading Capability: Multiple MCP23017T-E/SO devices can be cascaded to expand the I/O capacity further.

Advantages and Disadvantages

Advantages

• Easy to use and integrate with existing microcontroller systems
• Low power consumption
• Wide operating voltage range allows for compatibility with various systems
• Interrupt support reduces the need for continuous polling, conserving system resources

Disadvantages

• Limited to I2C communication protocol, may not be suitable for systems using other interfaces
• Higher cost compared to simpler I/O expanders due to advanced features

Working Principles

The MCP23017T-E/SO communicates with the host microcontroller through the I2C interface, allowing the microcontroller to control the I/O ports and receive interrupt notifications when configured. The device can be addressed uniquely in a multi-device I2C bus setup, enabling multiple MCP23017T-E/SO ICs to coexist on the same bus.

Detailed Application Field Plans

The MCP23017T-E/SO finds applications in various fields, including but not limited to: - Industrial automation - Home automation - Robotics - Consumer electronics - Automotive electronics - IoT (Internet of Things) devices

Detailed and