The MCP23008-E/ML is a 8-Bit General Purpose I/O Expander with Serial Interface and Clock Frequency of 1.7 MHz. Available in surface mount QFN-20 package.
Features:

8-bit remote bidirectional I/O port
I/O pins default to input
High-speed I2C™ interface (MCP23008)
100 kHz
400 kHz
1.7MHz
Hardware address pins
Two for the MCP23S08 to allow up to four devices using the same chip-select
Configurable interrupt output pin
Configurable as active-high, active-low or open-drain
Configurable interrupt source
Interrupt-on-change from configured defaults or pin change
Polarity Inversion register to configure the polarity of the input port data
External reset input
Low standby current: 1 μA (max.)
Operating voltage:
1.8V to 5.5V @ -40°C to +85°C
I2C @ 100 kHz