GENERAL DESCRIPTION
The CS42L56 is a highly integrated, 24-bit, ultra-lowpower stereo CODEC based on multi-bit delta-sigma modulation. Both the ADC and DAC offer many features suitable for low power portable system applications.

SYSTEM FEATURES
♦ Audio (11.2896 MHz or 12.288 MHz) or USB (12 MHz) Master Clock Input
♦ Low-power Operation
    – Stereo Anlg. Passthrough: 3.3 mW @1.8 V
    – Stereo Rec. and Playback: 8.3 mW @1.8 V
♦ Headphone Detect Input
♦ High Performance 24-bit Converters
    – Multi-bit Delta–Sigma Architecture
♦ Integrated High Efficient Power Management Reduces Power Consumption
    – Step-down Charge Pump Improves Efficiency
    – Inverting Charge Pump Accommodates Low System Voltage by Providing Negative Rail for HP/Line Amp
    – LDO Reg. Provides Low Digital Supply Voltage
♦ Digital Power Reduction
    – Very Low ADC/DAC Oversampling Rate
    – Bursted Serial Clock Providing up to 24 Bits per Sample
♦ Power Down Management
    – ADC, DAC, CODEC, PGA, DSP
♦ Analog & Digital Routing/Mixes
    – Line/Headphone Out = Analog In (ADC Bypassed)
    – Line/Headphone Out = ADC Out
    – Internal Digital Loopback
    – Mono Mixes
♦ I²C or SPI™ Control Port
♦ I²S or Left-justified Digital Interface Format
♦ Flexible Clocking Options
    – Master or Slave Operation
    – Wide Range of Sample Rates Supported

APPLICATIONS
♦ HDD and Flash-based Portable Audio Players
♦ PDAs
♦ Personal Media Players
♦ Portable Game Consoles
♦ Digital Voice Recorders
♦ MD Players/Recorders
♦ Digital Camcorders
♦ Digital Cameras
♦ Smart Phones