SM1155
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The CF(SM)1155 series are CMOS melody LSIs that, together with a battery and piezoelectric buzzer generate sound. An oscillator stop function in non-play mode and a variable pull-down resistance function reduce power consumption and extend battery life, making them ideal in a wide range of applications including the hold sound for telephones, greeting cards and toys, as well as white goods
SM1155.pdf
The CF(SM)1155 series are CMOS melody LSIs that, together with a battery and piezoelectric buzzer generate sound. An oscillator stop function in non-play mode and a variable pull-down resistance function reduce power consumption and extend battery life, making them ideal in a wide range of applications including the hold sound for telephones, greeting cards and toys, as well as white goods
Datasheets

Key Features
- 1.2~3.6 Supply Voltage
- 0.05 mA (typ) current consumption
- 1 melody
- Monotone sound generation
- Requires few external components
- Oscillator stop function in non-play mode
- Package: SOP-8
- Chip form
Applications
- Gift Cards
- Toys
- Industrial alerts/event notification
Benefits
- Low cost