HT3494 instrument equivalent, multi-function keyboard instrument.
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Operating voltage: 3.3V~5.1V On-chip crystal oscillator: 3.58MHz 49-key instrument and comp.
Keyboard scanning outputs C6 and C7 are used as common pins to generate a scanning drive signal for 7-segment LED displ.
The HT3494 is a CMOS VLSI designed for musical instruments, especially 49-key multi-function instruments. The HT3494 is built-in with a controller and an ETS (Electrical Tone Synthesizer). The HT3494 provides built-in melodies, rhythms, timbers and p.
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