name: 567 function: Tone decoder package: DIL8P,8 manufacturer: National added-by: Schalk Rabe +--()--+ Output filter | 1 8| Output Loop filter | 2 7| Ground Input | 3 6| VCO timing C +v | 4 5| VCO timing R +------+ This information was added by a third party and may be incorrect. This pinout came from the Chipdir: http://www.chipdir.org/