Datasheet - Alc271x

Keep the Analog Ground (AGND) plane strictly isolated from the Digital Ground (DGND) plane under the chip body. Tie them together at a single "star ground" point directly underneath the QFN die's exposed thermal pad. This technique safeguards weak microphone signals against digital clock switching interference. Anti-Pop Topology

Small form factor boards that require basic, reliable audio. Troubleshooting and Drivers

Optimized for low-noise audio, making it suitable for high-fidelity headphone outputs.

If you are looking to integrate or repair devices using this chip, technical documents and components are available from authorized distributors. alc271x datasheet

Unlike modern components that are hidden behind NDA walls, the ALC271X datasheet is widely available due to the age of the chip.

The chip is available in a QFN-48 package measuring approximately 6 × 6 mm. The QFN (Quad Flat No-leads) package offers advantages in terms of smaller footprint, improved thermal dissipation, and shorter signal paths compared to traditional leaded packages.

The ALC271X datasheet highlights several key features that make this chip an attractive option for audio designers: Keep the Analog Ground (AGND) plane strictly isolated

Since Realtek does not publicly host the ALC271X datasheet on its official website—a search for "site:realtek.com ALC271X" returns no direct results—engineers must rely on alternative sources. Here are the most practical methods for acquiring the document:

The ALC271X does not support 192 kHz sampling or 7.1 surround sound. It is strictly stereo line-out and stereo line-in/mic with a dedicated headphone amplifier.

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: Anti-Pop Topology Small form factor boards that require

The primary application, enabling high-definition audio jack output and microphone input.

+----------------------------------------------+ | Intel HD Audio Link | +----------------------------------------------+ | BCLK | SYNC | SDATA | RESET# v v v v +----------------------------------------------------------+ | Realtek ALC271X | | | | +---------------------+ +---------------------+ | | | 24-bit Stereo ADC | | 24-bit Stereo DAC | | | +---------------------+ +---------------------+ | | ^ | | | | v | | [Mic Boost Gain] [Pop-Noise Filter] | | ^ | | +-------------|------------------------------|-------------+ | v (Microphone Array) (Headphones / Speakers) Jack Detection and Port Re-Tasking

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Frequently Asked Questions

Keep the Analog Ground (AGND) plane strictly isolated from the Digital Ground (DGND) plane under the chip body. Tie them together at a single "star ground" point directly underneath the QFN die's exposed thermal pad. This technique safeguards weak microphone signals against digital clock switching interference. Anti-Pop Topology

Small form factor boards that require basic, reliable audio. Troubleshooting and Drivers

Optimized for low-noise audio, making it suitable for high-fidelity headphone outputs.

If you are looking to integrate or repair devices using this chip, technical documents and components are available from authorized distributors.

Unlike modern components that are hidden behind NDA walls, the ALC271X datasheet is widely available due to the age of the chip.

The chip is available in a QFN-48 package measuring approximately 6 × 6 mm. The QFN (Quad Flat No-leads) package offers advantages in terms of smaller footprint, improved thermal dissipation, and shorter signal paths compared to traditional leaded packages.

The ALC271X datasheet highlights several key features that make this chip an attractive option for audio designers:

Since Realtek does not publicly host the ALC271X datasheet on its official website—a search for "site:realtek.com ALC271X" returns no direct results—engineers must rely on alternative sources. Here are the most practical methods for acquiring the document:

The ALC271X does not support 192 kHz sampling or 7.1 surround sound. It is strictly stereo line-out and stereo line-in/mic with a dedicated headphone amplifier.

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:

The primary application, enabling high-definition audio jack output and microphone input.

+----------------------------------------------+ | Intel HD Audio Link | +----------------------------------------------+ | BCLK | SYNC | SDATA | RESET# v v v v +----------------------------------------------------------+ | Realtek ALC271X | | | | +---------------------+ +---------------------+ | | | 24-bit Stereo ADC | | 24-bit Stereo DAC | | | +---------------------+ +---------------------+ | | ^ | | | | v | | [Mic Boost Gain] [Pop-Noise Filter] | | ^ | | +-------------|------------------------------|-------------+ | v (Microphone Array) (Headphones / Speakers) Jack Detection and Port Re-Tasking