DESCRIPTION
WM9703 is a high-quality stereo audio codec compliant with the AC’97 Revision 2.1 specification. It performs full duplex 18-bit codec functions and supports variable sample rates from 8 to 48k samples/s and offers excellent quality with high SNR. Additional features include 3D sound and line-level outputs. In addition, support is provided for variable sample rates and accommodation is made for master/slave mode operation.

AC’97 FEATURES
• 3.3V or 5V operation
• 18-bit stereo codec
• S/N ratio > 95dB
• Multiple stereo input mixer
• Mono and stereo volume control
• 48-pin TQFP package
• Power management features
• Low power implementation
• Very low standby power

AC’97 REVISION 2.1 FEATURES
• Variable rate audio (VRA) support
• Analogue 3D stereo enhancement
• Line level outputs
• Supports Revision. 2.1 specified modem sample rates and filtering
• Master/slave ID selection
• PC-beep connection when device held reset