Alc271x Datasheet May 2026

The datasheet provides a reference schematic including:

The ALC271X (including variants like ALC271, ALC271X-VB, etc.) is a High Definition Audio (HDA) stereo codec chip designed by Realtek. It is commonly found in laptops and ultrabooks, offering a balance of performance and power efficiency.

The ALC271X is a high-definition audio codec from Realtek, commonly found in: alc271x datasheet

It’s a lower-power, 2-channel stereo codec with basic analog I/O.

  • Windows: Many OEMs use vendor-supplied HD-Audio drivers; customization done in driver INF and vendor-supplied codec module. Use vendor tools to map pins and define default routing.

    • Page 45 of the standard alc271x datasheet shows the reference design. For a functional audio section, you need five external components besides the codec: The datasheet provides a reference schematic including: The

    From the datasheet (rev. typically 1.2 or later):

    | Feature | Details | |---------|---------| | Host interface | Intel HDA (High Definition Audio) | | DAC | 24-bit, up to 192 kHz stereo | | ADC | 24-bit, up to 96 kHz mono/stereo | | Analog outputs | Line-out (stereo), headphone (stereo) | | Analog inputs | Mic-in (mono), Line-in (stereo) | | Jack detection | Yes (presence + impedance sense) | | Power | 3.3V (digital), 5V (analog) – check actual pin | | Package | QFN-48 (typical) | It’s a lower-power, 2-channel stereo codec with basic

    Disclaimer: This text is a synthesized summary based on typical Realtek HD Audio codec features. For design validation, always refer to the official ALC271X Datasheet (version 1.2 or later) from Realtek’s website or an authorized distributor.

    The ALC271X is fully compatible with Realtek’s Universal HD Audio Driver package. Operating systems supported include: