Alc271x: Datasheet

The Realtek ALC271X is a QFN-48 high-definition audio codec featuring up to 24-bit/192kHz resolution, high SNR, and built-in headphone amplifiers. Designed for laptop and desktop integration, it includes jack detection, 3.3V compatibility, and supports multiple audio streams. For detailed specifications, review the IC Components ALC271X-VB6-CG datasheet ALC892 - Realtek

Specifications

Chapter 7: Thermal and Mechanical Data

For PCB designers, the mechanical section of the alc271x datasheet is mandatory reading. alc271x datasheet

Core Architecture and Hardware Design The ALC271X is categorized as a High Definition Audio (HD Audio) codec, adhering to the Intel High Definition Audio specification. This standard replaced the older AC'97 standard, allowing for higher bandwidth, more channels, and better audio fidelity. The Realtek ALC271X is a QFN-48 high-definition audio

The Audio Interface Pins (Connection to Southbridge/Chipset)

| Pin # | Pin Name | HD Audio Mode Function | AC’97 Mode Function | | :--- | :--- | :--- | :--- | | 5 | SDATA_OUT | Serial Data Out (to codec) | Serial Data Out (to codec) | | 6 | SDATA_IN | Serial Data In (from codec) | Serial Data In (from codec) | | 7 | SYNC / BIT_CLK | 48MHz Bit Clock output | 12.288MHz Bit Clock output | | 8 | RST / RESET# | Active Low Reset | Active Low Reset | Realtek application note AN-112 (if available) Linux kernel

• Realtek application note AN-112 (if available)
• Linux kernel source sound/pci/hda/patch_realtek.c
• HDA specification (Intel)