The longevity of the ALC271X is largely due to its software ecosystem. Realtek provides drivers that interface seamlessly with major operating systems, primarily Microsoft Windows. The hardware abstraction layer allows the Operating System to recognize the codec instantly. While generic Microsoft drivers can usually get the device working, Realtek’s proprietary drivers unlock the full suite of features, including the graphical user interface for equalizer settings, surround sound simulation, and microphone gain control.
Typically housed in a 48-pin QFN (Quad Flat No-lead) package, making it suitable for compact motherboard designs.
No. Realtek has discontinued the ALC271X in favour of newer codecs (ALC255, ALC256, ALC3204). However, remaining stock is still available through electronics distributors.
| Model | Channels | DAC SNR | Package | Key Differences | |-------|----------|---------|---------|-----------------| | | 4‑channel | 98 dB | QFN‑48 | Very similar; shares driver quirks. ALC269 has different COEF tables. | | ALC271X | 4‑channel | 98 dB | QFN‑48 | 2 W Class‑D amp; 4‑pin headset detection quirks in Linux. | | ALC272 | 4‑channel | 98 dB | QFN‑48 | Slightly lower power consumption; different pinout. | | ALC892 | 8‑channel | 108 dB | LQFP‑48 | Premium variant; higher SNR; used in desktop motherboards. | | ALC662 | 5.1‑channel | 93 dB | QFN‑48 | Older, lower‑spec; AC'97 / HD Audio dual interface. |
If you are looking for specific revisions (e.g., ALC271X-VB6-CG) or CAD models (Symbols/Footprints) for your design, you can: Request a quote for pricing and stock information. Check Ultra Librarian for 3D models. alc271x datasheet
Due to its low power consumption and integrated amplifier. Mini-ITX Motherboards: For space-saving desktop designs.
The ALC271X is designed for scenarios where space is limited, but high-quality audio is required:
The chip features an intelligent jack detection circuit that monitors impedance shifts when an auxiliary cable is inserted. The companion software stack can trigger a , changing a physical port's function from a line-in to a headphone jack dynamically. Low-Power Optimization
This article was compiled from manufacturer specifications, OEM service manuals, ALSA kernel documentation, and electronic component distributor databases. For the most current information, refer to Realtek's official documentation. The longevity of the ALC271X is largely due
For developers, hardware engineers, and technicians needing the full schematic, pin mapping, or electrical characteristics, the datasheet is essential. It is available through authorized component distributors. ALC271X-VB6-CG Manufacturer: REALTEK Status: Active Production Conclusion
Download the official datasheet and application notes from the vendor website or your platform vendor. Reference driver source (ALSA, ASoC, and Windows HD-Audio modules) and vendor dev notes for platform-specific quirks.
Smaller component retailers may list the ALC271X as a drop-in replacement, but engineers should always verify the required variant code against the manufacturer's part number to ensure correct pinout and voltage compatibility.
General Purpose Input/Output pins used for custom hardware triggers (e.g., muting an external amp or lighting up a status LED). 4. Typical Application Circuit and Design Considerations While generic Microsoft drivers can usually get the
| Variant | Package | Key Features / Notes | |---------|---------|---------------------| | | QFN | Standard "green" (RoHS) variant. Tape & Reel packing. Often used in Acer E1‑521 series. | | ALC271X‑VB3‑GR | QFN‑48 | Features advanced noise cancellation and wide dynamic range handling. Designed for enhanced audio experience. | | ALC271X‑VB6‑CGT | QFN | Certified variant with full RoHS3 compliance; lead‑free. Factory lead time approximately 3 weeks. | | ALC271X‑GR‑VB6 | QFN | Featured in Acer Aspire V3‑571 (on‑board stereo support, 16‑/24‑bit PCM, HD Audio Interface, sample rate up to 192 kHz). | | ALC271X‑GR | QFN‑48 (oval version) | "Oval" physical die shape variant, sometimes listed as a replacement part for generic ALC271X repairs. |
| Parameter | Specification / Feature | | :--- | :--- | | | 16/20/24-bit PCM up to 192 kHz sample rate | | SNR (Signal-to-Noise) | 98 dB (DAC) / 90 dB (ADC) | | Output Channels | 4-channel DAC (Supports 2.1 or independent stereo) | | Input Channels | 4-channel ADC (Stereo or multi-source input) | | Power Voltages | 3.3V (Digital Core) / 1.5-3.3V (HDA IO) / 3.0-5.5V (Analog) | | Special Outputs | S/PDIF Out + 2W RMS Class-D Amplifier | | Package Type | QFN-48 (Lead-free / RoHS) |
The ALC271X serves as a bridge between digital data and analog sound. It integrates high-quality Digital-to-Analog Converters (DACs) and Analog-to-Digital Converters (ADCs).