SNC342

Direct Drive Voice/Dual Tone Melody Controller

VCC

BUO1/VO

1K

DAC output

PWM: A PWM (pulse width modulation) circuit is built-in SNC342. PWM can convert

input digital data into pulse trains with suitable different pulse width. The maximum

resolution of PWM is 7 bits. Two huge output stage circuits are designed in SNC342.

With this advanced circuit, the chip is capable of driving speaker directly without

external transistors.

The recommended application circuit is illustrated as follows.

BUO1/VO

BUO2

PWM Output

Ver: 1.2

December 26, 2002

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