UM3561 IC, ROM Sound Generator, PDIP8
The IC UM3561 comprises an oscillator as well as selector circuits. A compact sound module can be constructed with only a few additional components. The UM3561 contains a programmed mask ROM to simulate siren sound. There is a tone generator within UM3561, which is able to generate 4 different tones using the oscillator clock and according to the data given by the ROM. Each data stored in the ROM corresponds to each tone and it can be selected by using the address of the data location.
The typical operating voltage of UM3561 is 3V and the Operating Current Idd is 150μA. The output current of UM3561 is 3mA.
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