The max operating temperature of TMS570LS3137 is 125 degrees Celsius desclibed in
http://www.ti.com/product/tms570ls3137
But the max operating free-air temperature is 105 degrees Celsius desclibed in the page 42 of the data sheet.
http://www.ti.com/lit/gpn/tms570ls3137
Which is the true operating temperature?