MCP23017-E/SSVAO

Product Overview

• Category: Integrated Circuit
• Use: GPIO Expander
• Characteristics: High-performance, 16-bit I/O expander, I2C interface
• Package: SSOP-28
• Essence: Expand the number of available general-purpose input/output (GPIO) pins on a microcontroller
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

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

Detailed Pin Configuration

The MCP23017-E/SSVAO has a total of 28 pins in the SSOP package. The pin configuration is as follows:

1. GPA0
2. GPA1
3. GPA2
4. GPA3
5. GPA4
6. GPA5
7. GPA6
8. GPA7
9. VDD
10. VSS
11. INTA
12. INTB
13. RESET
14. SDA
15. SCL
16. GPB0
17. GPB1
18. GPB2
19. GPB3
20. GPB4
21. GPB5
22. GPB6
23. GPB7
24. A2
25. A1
26. A0
27. NC
28. NC

Functional Features

• Provides 16 additional GPIO pins using the I2C interface
• Can be cascaded with multiple MCP23017 devices for further expansion
• Supports interrupt-on-change feature for efficient event handling
• Configurable input and output polarity inversion
• Programmable pull-up resistors for each I/O pin
• Low standby current consumption

Advantages and Disadvantages

Advantages: - Easy to use and integrate with microcontrollers - High-performance and reliable operation - Flexible configuration options - Interrupt support for efficient event handling - Low power consumption

Disadvantages: - Limited to 16 additional GPIO pins - Requires I2C interface support on the microcontroller

Working Principles

The MCP23017-E/SSVAO is an I/O expander that communicates with a microcontroller using the I2C protocol. It provides 16 additional GPIO pins, which can be configured as inputs or outputs. The device acts as a bridge between the microcontroller and external devices, allowing the microcontroller to control and monitor more I/O signals.

The I2C interface enables easy communication with the microcontroller, requiring only two wires (SDA and SCL). The MCP23017-E/SSVAO can be addressed using different combinations of address selection pins, allowing multiple devices to be connected in a cascaded manner.

Detailed Application Field Plans

The MCP23017-E/SSVAO finds applications in various fields, including:

1. Industrial automation systems
2. Home automation and smart devices
3. Robotics and control systems
4. Internet of Things (IoT) devices
5. Sensor interfacing and data acquisition systems
6. Display and LED matrix control
7. Keypad and button scanning
8. Motor control and driver circuits

Detailed and Complete Alternative Models

1. MCP23S17-E/SSVAO: Similar to MCP23017 but uses SPI interface instead of I2C.
2. MCP23018-E/SSVAO: 8-bit version of MCP23017 with similar features.
3. PCF8574T: I2C-based 8-bit I/O expander from NXP Semiconductors.

These alternative models provide similar functionality and can be considered as alternatives to the MCP23017-E/SSVAO based on specific requirements and constraints.

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