Microchip MCP23S17-E/SO 16-Bit SPI I/O Expander SOIC-28

Microchip MCP23S17-E/SO 16-Bit SPI I/O Expander provides 16 bits of general purpose parallel I/O with a high-speed SPI interface running up to 10 MHz.

The MCP23S17-E/SO expands the input and output capabilities of a microcontroller, making it suitable for a wide range of embedded and communication systems. It is supplied in an SOIC-28 package and operates from a supply voltage range of 1.8 V to 5.5 V.

Overview

The 16-bit I/O port is functionally split into two 8-bit ports, PORTA and PORTB. Multiple 8-bit configuration registers for input, output and polarity selection give control over each I/O pin. Both 8-bit and 16-bit operating modes are supported via the IOCON.BANK register.

Key Features

• 16-bit I/O port, functionally split into two 8-bit ports (PORTA and PORTB)
• High-speed SPI interface (up to 10 MHz) and I2C interface
• Three hardware address pins, allowing up to eight devices on the same bus
• Configurable interrupt outputs (INTA and INTB) set as active high, active low or open drain, operating independently or together
• Interrupt-on-change feature to monitor pin states or register defaults, reducing the need for continuous polling
• Polarity inversion register to reverse the logic of input port data
• Supply voltage range of 1.8 V to 5.5 V
• Industrial temperature range of -40°C to +125°C
• Package: SOIC-28

Applications

This component is suited for communications, networking, consumer electronics, embedded design development and multimedia systems. Its feature set supports designs that require additional I/O alongside a microcontroller, with interrupt and polarity control.

Choose the Microchip MCP23S17-E/SO when your design needs additional parallel I/O controlled over SPI with configurable interrupt and polarity options.