The Realtek ALC271X (often ALC271X-VB6-CG) is a 48-pin MQFN High Definition Audio Codec frequently used in mobile computing platforms, sharing high architectural overlap with the ALC269 series. It supports Intel HDA links and features specific, often paired with "alc271-dmic" Linux kernel workarounds for digital microphone support. For detailed technical specs, review the Realtek ALC269 Datasheet. Realtek ALC269 DataSheet 1.5
This document is intended for the hardware and software engineer's general information on the Realtek ALC269 codec IC. Infania Networks ALC271X-VB6-CG REALTEK Audio ICs - Jotrin Electronics
Here’s a useful, technical review of the ALC271X datasheet — focused on what you’ll actually need to know as a hardware engineer, firmware developer, or Linux/Android audio integrator.
✅ Good for:
❌ Weak on:
Recommendation: Use the datasheet together with:
- Realtek application note AN-112 (if available)
- Linux kernel source
sound/pci/hda/patch_realtek.c- HDA specification (Intel)
If you tell me what you’re trying to do with the ALC271X (fix audio routing, add jack detection, design a carrier board, etc.), I can point you to the exact pages/registers you need. alc271x datasheet
Realtek ALC271X is a High Definition Audio Codec commonly found in laptop motherboards and small form-factor PCs. Because it is often used as a replacement part for board-level repairs, finding a clean datasheet can be tricky as they are frequently kept behind manufacturer paywalls or NDA. 1. Key Technical Specifications While specific revisions (like the ALC271X-VB6-CG
) vary slightly, the series generally adheres to these core specs: Architecture: 4-channel High Definition Audio Codec.
Supports 24-bit/192kHz output and input for high-fidelity audio. Package Type: Typically a (7x7 mm) package. Power Supply:
Designed for low-power mobile applications, often operating with a 3.3V digital and 5V analog supply. Key Features:
Integrated headphone amplifiers and microphone pre-amps with acoustic echo cancellation support. Jotrin Electronics 2. Pinout & Schematics Guide
If you are troubleshooting a dead audio circuit, focus on these critical pins (standard for the ALC270/271 series): Digital power supply (usually 3.3V). Analog power supply (usually 5V). HPOUT-L/R: Headphone output channels. Direct output to internal speakers. Active-low hardware reset signal from the Southbridge/PCH. 3. Where to Find the Datasheet The Realtek ALC271X (often ALC271X-VB6-CG) is a 48-pin
Since Realtek does not host these publicly for end-users, you can find the technical PDF through these community-trusted repositories: AllDatasheet: Often carries the ALC271X-VB6-CG Datasheet for a high-level overview. The RetroWeb:
A great resource for legacy audio codec documentation like the ALC272 series , which shares a similar architecture. Electronic Component Sites: Platforms like Jotrin Electronics IC Components provide basic lead-free and thermal specs. Jotrin Electronics 4. Common Use Cases Motherboard Repair:
Replacing the chip when a laptop has "No Audio Device Found" errors despite correct drivers. Custom Projects:
Using the codec in DIY SBC (Single Board Computer) designs for high-quality audio output. Driver Research:
Identifying the hardware ID to find the correct legacy Realtek HD Audio Manager drivers. on a specific laptop model, or are you designing a circuit ALC271X-VB6-CG REALTEK Audio ICs - Jotrin Electronics
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 Pin assignments Basic HDA verb commands Power consumption
The Realtek ALC271X is a High Definition audio codec with 2+2 channel support and integrated digital microphone capabilities, often utilizing a 48-pin QFN package. Closely related to the ALC269 series, it features an extended operating temperature range and is designed to meet Microsoft Windows logo requirements. Detailed technical parameters for the ALC271X-VB6-CG variant are available at Realtek ALC269 DAC+ADC DClass audio codecdatasheet-16rd
Unlike modern components that are hidden behind NDA walls, the ALC271X datasheet is widely available due to the age of the chip.
Reliable sources for the official PDF:
ALC271X – look for the file with Realtek letterhead (watermarked).Warning: Avoid "crawler" sites that deliver corrupted files or request payment. The ALC271X is an End-of-Life (EOL) component; no legitimate vendor charges for its datasheet.
The ALC271X is a high-definition audio codec from Realtek, commonly found in:
It’s a lower-power, 2-channel stereo codec with basic analog I/O.
The datasheet provides a reference schematic including:
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