Pinout of the IRL7833 N-channel MOSFET?
International Rectifier datasheets are never obvious with their pin labels.  They hide them in the engineering drawings of the packages.

For instance, the TO-220 package, on page 9 of the datasheet, has this drawing:



The pins are numbered 1-3 and the tab numbered 4.  To the right of that drawing is a little table:


  LEAD ASSIGNMENTS
  
  
  GATE
  DRAIN
  SOURCE
  DRAIN
  


The other packages are even less clear with the table being in tiny text hidden somewhere in the drawing.

The "max" threshold isn't the upper limit for the gate voltage - it's the upper limit of the threshold voltage - the voltage above which you should be to turn it on.  The threshold itself could be anywhere between MIN and MAX.  As long as you are above MAX then you are good.