Alc271x Datasheet Site

: Delivers clear playback and recording paths with low Total Harmonic Distortion plus Noise (THD+N).

High-end external sound cards or docking stations.

The is a high-performance, low-power High Definition Audio (HDA) codec designed primarily for laptops, ultrabooks, and small-form-factor desktop motherboards. As a staple integrated circuit (IC) in embedded multimedia design, understanding the ALC271X datasheet parameters is critical for hardware repair engineers, motherboard developers, and open-source operating system maintainers.

The ALC271X is a 4-channel High Definition audio codec designed to provide two stereo channels of output and one stereo channel of input, capable of simultaneous streaming. It supports 16/20/24-bit PCM formats for ADC and DAC, along with high sampling rates.

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Realtek ALC271X Datasheet: High-Definition Audio Codec Overview

| 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. |

Typically supplied in a 48-pin QFN (Quad Flat No-lead) package, ideal for space-constrained PCB designs.

To save space on cramped laptop motherboards, the ALC271X often integrates a bridge-tied load (BTL) Class-D amplifier. This allows it to drive internal speakers directly without needing a massive external amp, reducing the overall Bill of Materials (BOM) for manufacturers. 3. Noise Suppression and Echo Cancellation : Delivers clear playback and recording paths with

Over the years, Ubuntu and ALSA bug trackers have documented numerous issues:

Enhanced Acoustic Echo Cancellation capabilities to improve voice quality in voice-over-IP (VoIP) scenarios. 3. ALC271X Pinout and Packaging

The is a highly efficient, multi-channel High Definition Audio Codec designed by Realtek Semiconductor Corp. for laptop computers, desktop motherboards, and integrated multimedia systems. Sourcing the precise technical parameters for this chip requires navigating the ALC271X datasheet , a vital hardware guide for engineers designing circuits or technicians troubleshooting motherboard sound failures.

The IC features a hard-wired, analog-domain . When enabled via soft-registers, this algorithm broadens the perceived acoustic soundstage of closely spaced laptop speakers without altering the source audio file. Hardware Application and Implementation Rules As a staple integrated circuit (IC) in embedded

The (often seen in technical documents as part of the ALC271X-GR or ALC271X-VB series) is a High Definition Audio Codec designed primarily for portable computer systems. It is commonly found integrated into laptop motherboards from manufacturers like Acer and Lenovo . Technical Specifications

The ALC271X-VB6-CG (and related variants like ALC271X-GR) is a 4-channel High Definition Audio Codec. It is designed to meet Microsoft’s Windows Hardware Quality Labs (WHQL) requirements, ensuring seamless operation within Windows environments. The chip is designed to deliver crystal-clear audio with low power consumption, making it ideal for battery-operated devices. Audio Quality: High-performance DACs and ADCs.

A frequent defect in cheap audio integrations is an audible "pop" sound during system power-up or power-down. The ALC271X mitigates this using an integrated and an analog anti-pop ramp circuit tied to an external grounding capacitor. Sourcing & Replacement Information

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.

When reading the ALC271X datasheet, the electrical characteristics table is the most critical section for hardware verification. Audio Quality Metrics

Serial data input and output lines for transferring digital audio streams. 2. Analog Input/Output Ports