MCP23017E

 16-Bit Remote Bidirectional I/O Port: – I/O pins default to input
High-Speed I2C Interface (MCP23017): – 100 kHz – 400 kHz – 1.7 MHz
High-Speed SPI Interface (MCP23S17): – 10 MHz (maximum)
Three Hardware Address Pins to Allow Up to Eight Devices On the Bus
Configurable Interrupt Output Pin…