Analog outputs for headphones, front speakers, and line-out.
Fully compliant with Intel High Definition Audio 1.0 specification.
QFN-48 (Quad Flat No-lead) package. The Pinout is optimized for PCB layout, with analog signals and power pins carefully segregated to minimize crosstalk and interference. alc271x datasheet
The Realtek ALC271X (often seen as ALC271X-GR or variations like the ALC269) is a multi-channel High Definition Audio codec designed specifically for mobile systems. Its primary goal is to provide high-quality audio output while maintaining the low power consumption required for laptops and netbooks. Key Specifications
Integrated power-saving modes that meet modern "Green" hardware standards. Analog outputs for headphones, front speakers, and line-out
: Physically monitors audio ports using current-sensing logic. The system identifies when a plug is inserted and switches audio routing dynamically without processor overhead.
Due to its small footprint and high-performance audio capabilities, the Realtek ALC271X is found in: The Pinout is optimized for PCB layout, with
| 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 series is part of Realtek's efforts to offer robust audio solutions that meet the demands of both consumers and manufacturers looking for reliable, high-performance audio codecs. These chips are usually designed to support a wide range of audio applications, including 2-channel and multi-channel audio systems.
: Use the datasheet together with:
Based on the , the codec includes several advanced features that distinguish it from standard audio controllers. 2.1. High-Definition Audio Interface