MCP23017/MCP23S17 16-Bit I/O Expander with Serial.
Microchip Technology
MCP23S17 - 16-Bit I/O Expander
MCP23017/MCP23S17 16-Bit I/O Expander with Serial Interface Features • 16-Bit Remote Bidirectional I/O Port: - I/O pins default to input • High-Spee.