Alc271x Datasheet «720p»

(Section 6.2)

To confirm you have an ALC271X, check the Hardware ID in your system properties. It will usually look like HDAUDIO\FUNC_01&VEN_10EC&DEV_0271 .

Whether you are repairing a vintage gaming laptop or maintaining industrial control hardware, keep a copy of the official ALC271X datasheet in your engineering library—it will save you hours of reverse engineering. alc271x datasheet

: Supports independent stereo sound outputs and inputs simultaneously.

(Section 4.3)

Architecturally, the ALC271X is designed to balance performance with the strict power constraints of mobile devices. It typically supports a 2-channel DAC (Digital-to-Analog Converter) and a 2-channel ADC (Analog-to-Digital Converter). This configuration allows it to process stereo audio streams simultaneously—playing back sound while recording from a microphone, a necessity for modern communication applications like VoIP and video conferencing.

The ALC271X is commonly used in:

Place a combination of 10µF and 0.1µF ceramic capacitors as close as possible to the AVDD and DVDD power pins to filter high-frequency switching noise from the CPU voltage regulators.

The 98 dB DAC SNR places the ALC271X in the mid‑tier performance bracket for its era, comfortably exceeding the requirements for Windows Logo Program (WLP) certification for Windows XP, Vista, and 7. This ensured that laptops using the ALC271X could pass Microsoft's audio fidelity tests without additional external codecs. (Section 6

To successfully integrate the ALC271X into an embedded platform or laptop motherboard, engineers must prioritize proper thermal sinking and separation of grounding planes.