General Description
The CS42L73 is a highly integrated, low-power, audio and telephony CODEC for portable applications such as smartphones and ultra mobile personal computers.

Product Overview
For the full datasheet, visit
www.cirrus.com/codec-datasheets/CS42L73-17
♦ Stereo ADC
♦ Dual Analog or Digital MIC Support
♦ Dual MIC Bias Generators
♦ Four DACs Coupled to Five Outputs
    – Ground-Centered Stereo Headphone Amp.
    – Ground-Centered Stereo Line Output
    – Mono Ear Speaker Amplifier
    – Mono 1 W Speakerphone Amplifier
    – Mono Speakerphone Line Output for Stereo Speakerphone Expansion
♦ Three Serial Ports with Asynchronous Sample Rate Converters
♦ Digital Audio Mixing and Routing

System Features
♦ Native (no PLL required) Support for 6/12/24 MHz, 13/26 MHz, and 19.2/38.4 MHz Master Clock Rates in Add. to Typ. Audio Clock Rates
♦ Integrated High-efficiency Power Management Reduces Power Consumption
    – Internal LDO Regulator to Reduce Internal Digital Operating Voltage to VL/2
    – Step-down Charge Pump Provides Low Headphone/Line Out Supply Voltage
    – Inverting Charge Pump Accommodates Low System Voltage by Providing Negative Rail for HP and Line Amp
♦ Flexible Speakerphone Amplifier Powering
    – 3.00 V to 5.25 V Range
    – Independent Cycling
♦ Power Down Management
    – Individual Controls for ADCs, Dig. MIC Interface, MIC Bias Generators, Serial Ports, and Output Amplifiers & Associated DACs
♦ Programmable Thermal Overload Notification
♦ High-speed I²C™ Control Port (400 kHz)

Applications
♦ Smart Phones, UMPCs, and MIDs