MCP23009 is an 8-bit I/O expander with I2C™Compatible interface operating at speeds of up to 3.4MHz. The MCP23009 is available in 18-pin PDIP (300 mil), 18-pin SOIC (300 mil) and 20-pin SSOP packages.
Parameter Name Value
Device Description 8-bit I/O Port Expander
Operating Voltage Range (V) 1.8 to 5.5
Operating Temp Range (°C) -40 to 125
Interface I²C™
Max. Bus Frequency (kBits/s) 3400
Features
8-bit remote bidirectional I/O port:
- I/O pins default to input
Open-drain outputs:
- 5.5V tolerant
- 25 mA sink
- 200 mA total
Low standby current as low as 1 μA
High-speed I2C™ interface: 100 kHz, 400 kHz,3.4MHz
Single hardware address pin: Voltage input to allow up to eight devices on the bus
Configurable interrupt output pins: 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
