name: PCF8591 function: 8-bit A/D and D/A converter package: DIP16,16 manufacturer: Philips +--()--+ ain0 | 1 16| Vdd ain1 | 2 15| aout ain2 | 3 14| Vref ain3 | 4 13| agnd a0 | 5 12| ext a1 | 6 11| osc a2 | 7 10| scl Vss | 8 9| sda +------+ This pinout came from the Chipdir: http://www.chipdir.org/