GENERAL DESCRIPTION
ALC658 Datasheet Not only to meet performance requirements on PC99/2001 systems, but also to make PC sound quality as good as consumer equipment. The digital interface circuitry of the ALC658 CODEC operates from a 3.3V power supply for use in notebook and PC applications. The ALC658 integrates 50mW/20ohm headset audio amplifiers at Front-Out and AUX. Both are designed to be analog inputs and outputs automatically detected by hardware (Universal Audio Jack®). To save BOM costs for motherboard makers, the ALC658 features a built-in high accuracy 14.318M to 24.576MHz PLL, saving the cost of an extra 24.576MHz crystal. A PCBEEP generator is integrated and can be programmed by the BIOS to generate POST beeps without a buzzer. The ALC658 also supports S/PDIF input and output functions, which offers easy connection of PCs to consumer electronic products such as AC3 decoders/speakers, and mini disk devices. The ALC658 supports host/soft audio from Intel ICHx chipsets, as well as audio controller based VIA/SIS/ALI/AMD/nVIDIA/ATI chipsets.
Realtek
