Serial port voltage

Reading the data sheet for the 2130 controller it says the voltage limit for the serial port is 15v. Does this mean its a 12v serial interface or that it will work with serial ports up to 15v. I'm using a Jetson TX1 and its ports can be either 3.3 or 1.8 volts. So I'm a little concerned it will blow up the serial port on the jetson if its a 12v port.

Dan