Product_description: ["MCP23017 Series 5.5 V 1.7 MHz SMT 16-Bit I2C I/O Expander - QFN-28 ***** For more information refer to the specification sheet located in the 'Downloads' section below the image *****", 'MCP23017-E/ML, I2C Interface 1700kHz 5.5V 28-Pin QFN EP Tube (25 items)', 'MICROCHIP TECHNOLOGY Power Management IC Voltage Regulator LDO Linear Quad Flat Non-leaded Package 28-pin QFN Surface Mount 23017'] (Page 1)