<---> AC-Link (Sync, Bitclk, SD_IN/OUT) <---> ALC271X

In Linux, you may see it identified as:

To achieve the advertised 95dB SNR, the datasheet mandates specific external circuitry:

Specified for extended temperature ranges, typically from -40°C to 105°C (TA). Compliance: Fully compliant with AC'97 2.2 specifications. Key Features and Functionality

Because official standalone papers are restricted to authorized OEMs, repair communities rely on the following verified specifications extracted from board-level schematics: Realtek Category: Multi-channel High Definition Audio Codec Package Type: 48-pin QFN (Quad Flat No-leads)

Software-selectable inputs with a +30dB boost preamplifier to improve signal quality for voice communication.