name: UM3491 function: Melody Generator package: DIL-18,18 manufacturer: UMC added-by: Maarten Risseeuw comment: 3491-1 till 4 different melodies +--()--+ TP1 | 1 18| VDD MODE | 2 17| _BD_ TP2 | 3 16| BD LP | 4 15| MT1 CE | 5 14| ENV1 TRI | 6 13| MT0 BUSY | 7 12| ENV2 END | 8 11| OSC1 VSS | 9 10| OSC0 +------+ This information was added by a third party and may be incorrect. This pinout came from the Chipdir: http://www.chipdir.org/