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