AC ’97 2.3 COMPATIBLE FEATURES
   S/PDIF output, 20-bit data format, supporting
      48 kHz and 44.1 kHz sample rates
   Integrated stereo headphone amplifier
   Variable sample rate audio
   External audio power-down control
   >90 dB dynamic range
   Stereo full-duplex codec
   20-bit PCM DAC
   3 analog line-level stereo inputs for line-in, AUX, and CD
   Mono line-level phone input
   Dual MIC input with built-in programmable preamplifier
   High quality CD input with ground sense
   Mono output for speakerphone or internal speaker
      power management support
   48-lead LQFP package, Pb-free available

ENHANCED FEATURES
   Stereo MIC preamplifier support
   Built-in digital equalizer function for optimized
      speaker sound
   Full-duplex variable sample rates from 7040 Hz to
      48 kHz with 1 Hz resolution
   Jack sense pins for automatic output switching
   Software-programmed VREFOUT output for biasing
      microphone and external power amplifier
   Low power 3.3 V operation for analog and digital supplies
   Multiple codec configuration options