Alc271x Datasheet -
+--------------------------------------------+ | Realtek ALC271X | | | | [SPK_OUT_L+/-] ----> [ Ferrite Beads ] ----> Left Speaker | [SPK_OUT_R+/-] ----> [ Ferrite Beads ] ----> Right Speaker | | | [HP_OUT] ------------> [ AC Caps ] --------> Headphone Jack | [SENSE A] <--------------------------------- Jack Detect Switch | | +--------------------------------------------+ Decoupling Capacitors
The ALC271X's blend of high performance and low power consumption makes it a preferred choice for several sectors:
: Features a 4-channel multi-stream architecture supporting 16-bit, 20-bit, and 24-bit PCM linear audio formats. alc271x datasheet
: Synchronizes frame signals at a constant 48kHz frequency.
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. It is designed to meet Microsoft’s Windows Hardware
This chip belongs to Realtek's legacy HD Audio codec family and was widely adopted by major laptop manufacturers such as Acer, which incorporated the ALC271X into numerous models including the Aspire V3-571G, Aspire V5-571G, Aspire One AO725, TravelMate P243, and Aspire 4739 series. For context, the ALC271X is positioned as a "lightweight" codec in Realtek's lineup—a 2-channel solution optimized for portability and low power consumption, in contrast to desktop-oriented 8-channel codecs like the ALC885.
Connects to the host system via a high-speed HDA link. This chip belongs to Realtek's legacy HD Audio
Designed for low power consumption, making it suitable for portable computing. Package Type: Available in a 48-pin QFN (Quad Flat No-lead) package. Operating Temperature: Rated for an extended range of -40°C to 105°C IC Components Usage and Applications The ALC271X is primarily used in integrated PC audio solutions WIN SOURCE Laptops & Netbooks:
Place 0.1µF ceramic surface-mount capacitors as close as possible to the and DVDD pins to suppress high-frequency ripple. For bulk energy storage, place a 10µF tantalum or ceramic capacitor near the analog power plane entry point. Grounding Layout (AGND vs. DGND)