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Alc271x Datasheet May 2026

Example minimal init sequence (conceptual — consult datasheet/register map):

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

  • Channels: 2-channel stereo output with independent sampling rates for playback and record.
  • SNR (Signal-to-Noise Ratio):
  • Connectivity:
  • Power Management: Supports multiple power states (D0, D3hot, D3cold) with < 0.1W standby power.
  • Package: 48-pin LQFP or compatible QFN variant (refer to specific ordering number).

    • ❌ Missing in many versions:

    ❌ Typo risk:

    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.

    Realtek generally does not provide public datasheets for their codec chips on their main website; these are typically restricted to manufacturers (OEMs/ODMs) under NDA.

    However, you can often find the document through the following methods:

    Search Tip: For the most accurate results, search for the specific full part number printed on the chip (e.g., ALC271X-VB, ALC271-GR).

    Realtek ALC271X is a high-definition audio codec typically used in laptop and desktop motherboards to manage sound input and output. It belongs to a family of chips designed for low-power, high-quality multimedia performance. WIN SOURCE Core Specifications Based on available technical data, the ALC271X features: Package Type: Small 48-pin MQFN (Multi-row Quad Flat No-leads). Operating Temperature: Extended range from negative 40 raised to the composed with power C 105 raised to the composed with power C cap T sub cap A Performance:

    High Signal-to-Noise Ratio (SNR) and low distortion rates, making it suitable for high-fidelity audio applications in mobile devices. Common versions include the ALC271X-VB6-CG ALC271X-VB3-GR IC Components Market and Supply Details Manufacturer: Realtek Semiconductor Availability: alc271x datasheet

    While it has relatively low popularity in the current open market, specialized electronic distributors like Jotrin Electronics Win-Source often maintain stock for repairs and manufacturing. Counterfeit Risk:

    Buyers should exercise caution, as some market reports indicate a high "fake threat" (over 50%) in the open secondary market. IC Components Applications The chip is primarily integrated into: Laptops and Netbooks:

    Popular in legacy mobile computers for its balance of power efficiency and audio quality. Desktop Motherboards: Used for onboard audio solutions. WIN SOURCE

    For a full technical pinout or register descriptions, you can often find unofficial PDF downloads via Alldatasheet or specific component repositories. Google Docs or specific driver download links for a particular operating system? ALC271X-VB6-CG Datasheet, PDF - ALLDATASHEET.COM

    The Realtek ALC271X (often seen in technical documents as part of the ALC271X-GR or ALC271X-VB series) is a High Definition Audio Codec designed primarily for portable computer systems. It is commonly found integrated into laptop motherboards from manufacturers like Acer and Lenovo. Technical Specifications

    Based on typical datasheet summaries for the Realtek ALC271X series:

    Audio Channels: 4-channel High Definition Audio Codec (2 channels for stereo output and 2 for stereo input).

    Resolution/Sampling: Supports 16/20/24-bit PCM format for stereo audio playback.

    DAC/ADC: High-performance Digital-to-Analog Converters (DACs) with a typical Signal-to-Noise Ratio (SNR) of 95dB or higher. Channels : 2-channel stereo output with independent sampling

    Power Supply: Designed for low power consumption, usually operating on a 3.3V digital core and 3.3V to 5V analog supply.

    Compliance: Fully compliant with Intel High Definition Audio Specification Rev. 1.0. Key Features

    Integrated Amplifiers: Often includes integrated headphone amplifiers with "jack-sensing" capabilities to automatically detect when a peripheral is plugged in.

    Power Management: Features advanced power-saving modes suitable for mobile devices, allowing the codec to enter low-power states when not in use.

    EAPD Support: Includes External Amplifier Power Down (EAPD) control for managing external audio components. Common Implementation

    The ALC271X is frequently paired with mobile processors and chipsets such as the Intel Arrandale or AMD Brazos platforms. It is often implemented on 8-layer PCB stackups in notebooks to minimize interference and ensure audio clarity. Component Feature Specification/Typical Value Interface HDA (High Definition Audio) Output SNR Input SNR Package 48-pin LQFP Special Function Stereo digital microphone input support

    For detailed electrical characteristics and layout guidelines, engineers typically refer to the full ALC271X Datasheet and Application Manual provided by Realtek. Intel Arrandale BM5958 M/B Schematics | PDF - Scribd

    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 Realtek ALC271X is a high-performance, multi-channel audio codec designed for laptops and desktops, offering high signal-to-noise ratios and low distortion. Housed in a QFN-48 package, this RoHS-compliant component provides operational stability between -40°C and 105°C, making it suitable for both consumer and industrial applications. For more details, visit Win Source. ALC271X-VB6-CG Realtek – Price, Stock & Datasheet Connectivity :

    ALC271X Datasheet Overview

    The ALC271X is a high-performance audio codec chip designed by Realtek, a leading company in the field of audio and multimedia solutions. This datasheet provides an in-depth look at the features, specifications, and applications of the ALC271X.

    Introduction

    The ALC271X is a highly integrated audio codec that combines high-quality audio processing, advanced noise reduction, and robust connectivity options. It is designed to meet the demands of modern computing systems, including laptops, desktops, and gaming consoles. The ALC271X supports a wide range of audio interfaces, including AC'97, HD Audio, and USB audio.

    Key Features

    Specifications

  • Audio Interfaces:
  • Power Consumption:

    • Applications

    The ALC271X is suitable for a wide range of applications, including:

    Conclusion

    The ALC271X datasheet provides a comprehensive overview of the features, specifications, and applications of this high-performance audio codec chip. With its advanced noise reduction, flexible audio routing, and low power consumption, the ALC271X is an ideal solution for a wide range of audio applications. Whether you're designing a laptop, desktop, or home entertainment system, the ALC271X is a reliable and high-quality audio solution.

    The Realtek ALC271X is a QFN-48 high-definition audio codec featuring up to 24-bit/192kHz resolution, high SNR, and built-in headphone amplifiers. Designed for laptop and desktop integration, it includes jack detection, 3.3V compatibility, and supports multiple audio streams. For detailed specifications, review the IC Components ALC271X-VB6-CG datasheet ALC892 - Realtek