SM1350

NIPPON PRECISION CIRCUITS INC. SM1350 series High Tone Quality Melody LSI OVERVIEW The SM1350 series are single-chip high tone quality melody ICs, fabricated using NPC’s Molybdenumgate CMOS process. Melodies are selected in serial or binary (parallel) mode, up to a maximum of 16 melody blocks. There are 4 sound generators incorporated to produce 4 kinds of output tone controlled by 16-tone data, making these ICs ideal for mechanical clocks and similar applications where high tone quality output is demanded. FEATURES s Basic Functions 4.0 MHz oscillator frequency Power-save function - Oscillator stopped when no output - S0 to S3, MODE, LH pull-up resistors open BTL or A-class outputs Chattering prevention circuit (STN, STOP, S0 to S3) 10-bit D/A converter s Sound Generator Functions DWS (dual wave synthesis) sound generators 4 simultaneous sounds for 4 tones G2 to F#7 note range 16-tone programmable s Melody Functions Up to 16...