MCP23008/MCP23S08 8-Bit I/O Expander with Serial I.
Microchip Technology
MCP23S08 - 8-Bit I/O Expander
MCP23008/MCP23S08 8-Bit I/O Expander with Serial Interface Features • 8-Bit Remote Bidirectional I/O Port - I/O pins default to input • High-Speed I2.