MICROCHIP MCP23018-E/SP IC, I/O EXPANDER, 16BIT, 3.4MHZ, DIP-28 Order Unit: Each 1 Bus Frequency:: 3.4 Chip Configuration:: 16bit IC Interface Type:: I2C Interface Case Style:: DIP MSL:: - No. of I/O's:: 16 No. of Pins:: 28 Packaging:: Each SVHC:: No SVHC (17-Dec-2014) Supply Voltage Max:: 5.5 Supply Voltage Min:: 1.8 Supply Voltage Range:: 1.8V to 5.5V