OVERVIEW
The SM1126 Series are melody ICs for use in mobile telecommunications equipment. A maximum of 15 melodies can be stored in programmable ROM and one in built-in read/write SRAM.

FEATURES
■ 2.0 to 3.6 V supply voltage
■ Maximum of 16 melody selections (15 in ROM + 1 in SRAM)
■ Level hold playback mode
■ External reference clock input versions and builtin RC oscillator versions available, set by masterslice option (RC oscillator versions require an external resistor and capacitor).
■ Selectable clock frequencies (fixed for all melodies)
    • External clock input versions (6 frequencies)
        - 32.768 kHz system: 32.768, 65.536 and 131.072 kHz
        - 38.4 kHz system: 38.4, 76.8 and 153.6 kHz
    • Built-in RC oscillator versions (1 frequency) - 131.072 kHz
■ 2-pin serial data melody selection and 1-pin melody playback control
■ Parity check function
■ Delivery pattern alarm
■ Power save function
    • External clock input versions Clock gating in non-play modes
    • Built-in RC oscillator versions Oscillator stopped in non-play modes