!!! MCP2200 is USB<> serial MCP6L04 is AMPLIFIER NOT EVEN CLOSE
there is NO direct drop in replacement for mcp2200 , may i ask why looking for equivelant, considering that MCP2200 is still under productio?
if you need some kind of equivelant you can compare with prolific 2303 / ftdiseries, and hundrent of others usb<>Serial//