name: UM3511A function: Melody Organ Generator package: DIL-18,18 manufacturer: UMC added-by: Maarten Risseeuw +--()--+ NC | 1 18| VDD MODE | 2 17| C1 TEST | 3 16| C2 RESET | 4 15| C3 OUTPUT | 5 14| C4 ENV | 6 13| R1 OSC1 | 7 12| R2 OSC2 | 8 11| R3 VSS | 9 10| R4 +------+ This information was added by a third party and may be incorrect. This pinout came from the Chipdir: http://www.chipdir.org/