KD9561 Four-tone Alarm Sounds Melody Generator Chip

Description

kD9561 CK9561 Four-tone alarm sound chip music IC music integrated block There are four kinds of alarm sounds, in fact only three are used, namely 110** alarm sound, 119 fire alarm sound, 120 medical rescue sound, and the other machine gun sound is mainly used for toy guns. Sound effect selection sound termination method SEL1/K1 – SEL2/K2 Connection type: Alarm whistle : SEL1=NC – SEL2=NC Fire alarm : SEL1=VCC – SEL2=NC Ambulance voice :SEL1=GND – SEL2=NC Machine guns sound: SEL1=NC – SEL2=VCC