ALC272 ALC272X Realtek Audio Codec IC

ALC272 and ALC272X are High Definition (HD) Audio Codec ICs manufactured by Realtek Semiconductor. These models are widely used in laptop and notebook motherboards, especially in older and mid-generation systems from Dell, HP, Lenovo, Acer, and Toshiba.

Both ICs handle core onboard audio functions such as speaker output, headphone jack detection, and microphone input. The ALC272X is a variant of ALC272 with minor OEM-specific tuning (pin configuration or power optimization), but functionally they are interchangeable in most repair scenarios when the motherboard design allows.

Common fault symptoms include no sound, distorted audio, microphone not detected, or headphone jack not working, making these ICs frequent replacements in professional motherboard repair.

Technical Summary

• Intel High Definition Audio (HDA) compliant codec

• Supports stereo speakers and headphone output

• Integrated microphone input with jack sensing

• Low power design for laptop platforms

• QFN SMD package for motherboard-level repair