Description:
16-Bit Remote Bidirectional I/O Port:

– I/O pins default to input
• High-Speed I2C Interface (MCP23017):
– 100kHz
– 400kHz
– 1.7MHz
• High-Speed SPI Interface (MCP23S17):
– 10 MHz (maximum)
• Three Hardware Address Pins to Allow Up to
Eight Devices On the Bus
• Configurable Interrupt Output Pins:
– Configurable as active-high, active-low or
open-drain
• INTA and INTB Can Be Configured to Operate
Independently or Together
• Configurable Interrupt Source:
– Interrupt-on-change from configured register
defaults or pin changes
• Polarity Inversion Register to Configure the
Polarity of the Input Port Data
• External Reset Input
• Operating Voltage:
– 1.8V to 5.5V @ -40°C to +85°C
– 2.7V to 5.5V @ -40°C to +85°C
– 4.5V to 5.5V @ -40°C to +125°C