UM3481 Series
UM3481A Multi-Instrument Melody Generator
_____________________________________________________________________________Features
• Powered by a 1.5V battery • 8 beats selectable
• Low standby current • 3 timbres - piano, organ, and mandolin
• 512-note memory, up to 16 songs • 5 tempos available through mask setting
• 8 playing modes by user setting • 14 tones selectable
• One built-in RC oscillator • On-chip envelope modulator and pre-amplifier
General Description
The UM3481 series is a mask-ROM-programmed multi-instrument melody generator , implemented by
CMOS technology. It is designed to play the melody according to the previously programmed
information and is capable of generating 16 songs with 3 instrument effects : piano, organ and mandolin.
The device also includes a pre-amplifier which provides a simple interface to the driver circuit. The
M3481 series is intended for applications such as toys, door bells, music box, melody clock/timers and
telephones.
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