SNC552

Two Channel Direct Drive Speech Controller

VCC

BUO1/VO

1K

DAC output

PWM: A PWM (pulse width modulation) circuit is built-in SNC552. 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 SNC552. 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

November 26, 2002

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