name: LM219 function: Highspeed dual comparator package: PQFP20,20 manufacturer: National Semiconductor +---------+-------------+-------------+-------------+ | 1 - nc | 6 - input1+| 11 - nc | 16 - V+ | | 2 - nc | 7 - nc | 12 - gnd2 | 17 - nc | | 3 - nc | 8 - input1-| 13 - input2+| 18 - output1| | 4 - gnd1| 9 - V- | 14 - input2-| 19 - nc | | 5 - nc | 10 - output2| 15 - nc | 20 - nc | +---------+-------------+-------------+-------------+ This pinout came from the Chipdir: http://www.chipdir.org/