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Realtek ALC655 (sound chip)
Release: 1.3 from 2006-03-16
File: alc655_datasheet_1.3.pdf
Downloaded: 14068×
Designed only for Realtek ALC655 ALC655-LF
The ALC655 is a 16-bit, full duplex AC'97 2.3 compatible six-channel audio CODEC designed for PC multimedia systems, including host/soft audio and AMR/CNR based designs. The ALC655 incorporates proprietary converter technology to meet performance requirements on PC99/2001 systems. The ALC655 CODEC provides three pairs of stereo outputs with 5-Bit volume controls, a mono output, and multiple stereo and mono inputs, along with flexible mixing, gain and mute functions to provide a complete integrated audio solution for PCs. The digital interface circuitry of the ALC655 CODEC operates from a 3.3V power supply for use in notebook and PC applications. The ALC655 integrates 50mW/20ohm headset audio amplifiers at Front-Out and Surr-Out, built-in 14.318Må24.576MHz PLL and PCBEEP generator, those can save BOM costs. The ALC655 also supports the S/PDIF input and output function, which can offer easy connection of PCs to consumer electronic products, such as AC3 decoder/speaker and mini disk devices. ALC655 supports host/soft audio from Intel ICHx chipsets as well as audio controller based VIA/SIS/ALI/AMD/nVIDIA/ATI chipset. Bundled Windows series drivers (WinXP/ME/2000/98/NT), EAX/ Direct Sound 3D/ I3DL2/ A3D compatible sound effect utilities (supporting Karaoke, 26-kind of environment sound emulation, 10-band equalizer), HRTF 3D positional audio and Sensaura™ 3D (optional) provide an excellent entertainment package and game experience for PC users. The ALC655 includes Realtek’s impedance sensing techniques that allow device loads on inputs and outputs to be detected.

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