Add MCP23008 i2c IO expander
Created by: nivekg
Hey people,
Here's a symbol for the MCP23008 i2c IO expander. Since they come in three different packages, I made three symbols with the package name abbreviations added to the end of the symbol name. Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/MCP23008-MCP23S08-Data-Sheet-20001919F.pdf
The screenshot of the symbols are attached.
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