+-------------------------------------------------------+ | REALTEK ALC271X | | | | +---------------+ +--------------+ | ------>| | HDA Bus Link | | Stereo DACs |===>| Headphone Out (Host) | | Interfaces | +--------------+ | (High-Current) | +-------+-------+ ^ | | | | | | v | | | +---------------+ +-------+------+ | <======| | Audio Mixing |<------------>| Stereo ADCs |<---| Mic / Line Inputs (I/O) | | Engine Matrix | +--------------+ | (Pre-Amplified) | +---------------+ | +-------------------------------------------------------+ Decoupling Capacitor Placement
The device supports up to of output (two independent stereo streams or a 2.1 speaker setup) and the simultaneous input of four channels of microphone or line-in audio. It also features flexible, programmable boost gains for analog microphone inputs (+12/+24/+36 dB), making it compatible with different microphone sensitivities. The analog microphone path includes a software-selectable VREFOUT voltage (2.5V/3.2V) to provide bias for electret microphones.
The ALC271X is commonly used in:
The official datasheet is the definitive source for register maps, detailed pinouts, and application circuits. You can access the documentation via these direct sourcing links:
Supports distinct audio streaming formats, natively adapting up to 96 kHz for high-resolution playback, such as DVD-audio structures. 2. Power Rail Profiles alc271x datasheet
The is a high-performance High Definition (HD) Audio Codec designed for advanced audio applications, frequently utilized in laptops, all-in-one PCs, and embedded systems. As a member of Realtek’s esteemed audio component family, the ALC271X provides a specialized, energy-efficient solution for systems requiring premium sound quality in a small footprint, typically utilizing a QFN-48 package for PCB integration.
(For detailed pin assignments and circuit design, users should consult the official Realtek ALC271X datasheet). 4. Typical Applications
The component is Lead-free and RoHS compliant , meeting modern environmental and safety standards for electronic manufacturing. Hardware Architecture and Features
cat /proc/asound/card0/codec#0 | grep "Codec:" The ALC271X is commonly used in: The official
Because headphone and microphone jacks are external touchpoints, implement transient voltage suppressor (TVS) diodes on all external lines to safeguard the ALC271X from electrostatic discharge.
This codec belongs to Realtek's legacy HD Audio family and was widely adopted in —particularly Acer's Aspire series, including models such as the Aspire 4739, Aspire V5-571G, TravelMate P243, Aspire M3-581T, and Acer One AO756 . It delivered a balanced mix of audio fidelity, power efficiency, and integration simplicity at a price point ideal for consumer notebooks.
The 24MHz clock source provided by the host controller. SYNC: Frame sync signal. RST#: Hardware reset line.
The ALC271X appears in several major manufacturing lines, most notably Acer and Lenovo. It is often paired with Intel mobile chipsets. Power Rail Profiles The is a high-performance High
A hardware chip is only as good as its software. The ALC271X relies on the stack. Device Driver Architecture
In many cases, "Code 10" errors in Windows aren't hardware failures but rather a mismatch between the Realtek generic driver and the OEM’s specific implementation.
The ALC271X is typically packaged in a 64-pin TQFP (Thin Quad Flat Package) or a 48-pin LQFP (Low-profile Quad Flat Package). The pinout includes: