Microchip I/O Expander SPI QFN 18, MCP23S08T-E/ML

The Microchip 8 bit General purpose parallel I/O expansion for I2C bus or SPI applications. Its consists of multiple 8 bit configuration registers for input, output and polarity selection. The system master can enable the I/Os as either inputs or outputs by writing the I/O configuration bits.

• 8 bit port expander with interrupt output
• 3 address inputs for up to 8 devices on one bus
• Internal power on reset