Alc271x Datasheet !new! May 2026

Realtek ALC271X (often seen as part number ALC271X-VB6-CG) is a High Definition (HD) Audio Codec

Handles standard PC audio functions, including stereo speaker output, internal microphone arrays, and jack sensing for front-panel headphones. Sourcing and Safety If you are looking to purchase or replace this chip: ALC271X-VB6-CG.pdf - IC Components alc271x datasheet

Block diagram and signal flow

• Analog inputs: MIC1/MIC2 (may support differential mics), LINE_IN
• Preamps and ADC: Input preamplifiers with programmable gain followed by ADCs
• Digital mixer/DSP: Sample-rate converters, digital volume, mixing, EQ, echo cancellation hooks (feature-set varies)
• DACs and headphone amp: Digital-to-analog conversion, analog filters, headphone amplifier with mechanical pop suppression and impedance sensing
• Control interfaces: I2C/SMBus or HD-Audio link for PC codecs; registers exposed for power, bias, gain, jack detection
• Power management: Separate domains for AVDD/AVSS, DVDD; power sequencing and LDO recommendations in datasheet

The ALC271X datasheet includes a functional block diagram that illustrates the chip's internal architecture. This diagram shows the various components that make up the chip, including: Realtek ALC271X (often seen as part number ALC271X-VB6-CG)