Overview
The MCP23S17-E/SO is a 16-bit I/O expander produced by Microchip Technology. This device is designed to provide general-purpose parallel I/O expansion for both I2C and SPI bus applications. It is particularly useful in systems where additional I/O ports are needed beyond what the microcontroller can provide. The MCP23S17-E/SO is housed in a 28-pin SOIC package, making it suitable for a variety of embedded design and development projects.
Key Specifications
| Parameter | Value |
|---|---|
| Number of I/Os | 16 |
| Interface Type | SPI, I2C |
| Voltage Range | 1.8V to 5.5V |
| Package Type | SOIC-28 |
| Operating Temperature Range | -40°C to 125°C |
| Bus Frequency | Up to 10MHz |
| Hardware Address Pins | 3 (allowing up to 8 devices on the bus) |
| Interrupt Output Pins | Configurable as active high, active low, or open drain |
Key Features
- 16-bit general-purpose parallel I/O expansion
- SPI and I2C interface compatibility
- Three hardware address pins allowing up to eight devices on the bus
- Configurable interrupt output pins (INTA and INTB) that can operate independently or together
- Configurable interrupt source and polarity inversion register
- Support for interrupt on change from configured register defaults or pin changes
Applications
The MCP23S17-E/SO is versatile and can be used in various applications, including:
- Communications and Networking
- Consumer Electronics
- Embedded Design and Development
- Multimedia
Q & A
- What is the MCP23S17-E/SO used for?
The MCP23S17-E/SO is used for 16-bit I/O expansion in systems using SPI or I2C interfaces. - What package type does the MCP23S17-E/SO come in?
The MCP23S17-E/SO comes in a 28-pin SOIC package. - What is the operating voltage range of the MCP23S17-E/SO?
The operating voltage range is from 1.8V to 5.5V. - How many hardware address pins does the MCP23S17-E/SO have?
The MCP23S17-E/SO has three hardware address pins, allowing up to eight devices on the bus. - Can the interrupt output pins be configured?
Yes, the interrupt output pins (INTA and INTB) can be configured as active high, active low, or open drain. - What is the maximum bus frequency supported by the MCP23S17-E/SO?
The maximum bus frequency supported is up to 10MHz. - In what temperature range can the MCP23S17-E/SO operate?
The MCP23S17-E/SO can operate in a temperature range of -40°C to 125°C. - What types of interfaces does the MCP23S17-E/SO support?
The MCP23S17-E/SO supports both SPI and I2C interfaces. - Can the interrupt source be configured?
Yes, the interrupt source can be configured, and the device also supports interrupt on change from configured register defaults or pin changes. - In which applications is the MCP23S17-E/SO commonly used?
The MCP23S17-E/SO is commonly used in communications and networking, consumer electronics, embedded design and development, and multimedia applications.
