name: LH4001 function: Wideband Current buffer package: DIP10,10 manufacturer: National Semiconductor +--()--+ Vs2+ | 1 10| nc Vs1+ | 2 9| nc Vin | 3 8| Vout Vs2- | 4 7| nc Vs2- | 5 6| nc +------+ This pinout came from the Chipdir: http://www.chipdir.org/