CF1155

 Requires few external components
 1.2 to 3.6V wide operating voltage range
Low power consumption
 3 melody modes (bonding option)
 Oscillator stop function in non-play mode
 Power saving pull-down resistor built-in
 RC oscillator circuit
 Power-ON initialization function
 2 V_SS pad connections
 Wide pitch dynamic range (G₃ to D₇)
 Chip form