SM1155 Datasheet | Nippon Precision Circuits Inc

SM1155 series NIPPON PRECISION CIRCUITS INC. Melody LSIs OVERVIEW The SM1155 series are CMOS melody LSIs that, together with a battery and piezoelectric buzzer, operate in one of 3 melody modes determined by bonding options. They also feature an oscillator stop function in nonplay mode and a variable pull-down resistance function that responds to input levels in order to reduce power consumption, reduce cost, and extend battery life, making them ideal in a wide range of applications including the hold sound for telephones and toys. Features I I I I I I I I I I Requires few external ponents 1.2 to 3.6V wide operating voltage range Low power consumption 3 melody modes (bonding option)...