MCP23018-E/SP

Product Overview

Category

The MCP23018-E/SP belongs to the category of integrated circuits (ICs) specifically designed for input/output (I/O) expansion.

Use

This product is commonly used to expand the number of I/O pins available on a microcontroller or microprocessor. It provides an easy and efficient way to increase the number of digital inputs and outputs in various electronic applications.

Characteristics

• 16-bit remote bidirectional I/O port
• High-speed I2C interface (up to 1.7 MHz)
• Three hardware address pins for up to eight devices on the bus
• Interrupt output pin for efficient event notification
• Low standby current consumption (less than 1 µA)

Package

The MCP23018-E/SP is available in a small outline package (SOIC) with a wide operating temperature range (-40°C to +85°C). This package ensures ease of integration into various electronic systems.

Essence

The essence of the MCP23018-E/SP lies in its ability to provide additional I/O pins, enabling greater flexibility and functionality in electronic designs.

Packaging/Quantity

This product is typically sold in reels or tubes, containing a specified quantity of MCP23018-E/SP ICs. The exact quantity may vary depending on the supplier.

Specifications

• Supply Voltage: 1.8V to 5.5V
• Maximum I/O Pins: 16
• Operating Temperature Range: -40°C to +85°C
• I2C Bus Frequency: Up to 1.7 MHz
• Standby Current: Less than 1 µA

Detailed Pin Configuration

The MCP23018-E/SP features a total of 28 pins, each serving a specific purpose. The detailed pin configuration is as follows:

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

Functional Features

The MCP23018-E/SP offers several functional features that enhance its usability and versatility:

• Bidirectional I/O: Each pin can be individually configured as an input or output, allowing for flexible data transfer.
• Interrupt Capability: The interrupt output pins (INTA and INTB) provide efficient event notification, reducing the need for continuous polling.
• I2C Interface: The high-speed I2C interface enables seamless communication with microcontrollers or microprocessors, simplifying integration into existing systems.
• Hardware Addressing: The three hardware address pins (A0, A1, and A2) allow up to eight MCP23018-E/SP devices to coexist on the same I2C bus.

Advantages and Disadvantages

Advantages

• Provides additional I/O pins, expanding the capabilities of microcontrollers or microprocessors.
• Low standby current consumption ensures energy efficiency in battery-powered applications.
• Interrupt capability reduces the need for constant polling, improving overall system performance.
• Wide operating temperature range allows for use in various environmental conditions.

Disadvantages

• Limited to 16 I/O pins, which may not be sufficient for complex applications requiring a large number of inputs and outputs.
• Requires an I2C bus for communication, which may add complexity to the system design.

Working Principles

The MCP23018-E/SP operates based on the I2C protocol, which facilitates communication between the device and the microcontroller or microprocessor. By