Featuring four 16-bit two-channel DACs and a stereo 16-bit ADC, the ALC850 and ALC850D are AC’97
Rev 2.3 compatible eight-channel audio codecs designed for PC multimedia systems. The ALC850(D)
incorporates proprietary converter technology and fully meets performance requirements for PC99/2001
systems.

Four pairs of stereo outputs, with 5-bit volume control and multiple stereo and mono inputs, along with
flexible mixing, and gain and mute functions, provide a complete integrated audio solution for PCs. The
digital interface circuitry of the ALC850(D) operates from a low-power-consumption 3.3V power supply.

Two integrated 50mW/20ohm headphone audio amplifiers provide high-quality personal audio listening.
Utilizing Universal Audio Jack® technology, Line-In and Mic-In can also serve as an amplified stereo
Headphone-Out. In addition, the ALC850(D) is embedded with an impedance sensing capability to detect
when a device has been connected to input or output jacks.

The ALC850(D) integrates an on-board dual PLL clock generator (14.318MHz and 24.576MHz), saving
the cost of a 24.576MHz crystal. A PCBEEP generator is built-in and can be programmed by the BIOS to
generate POST beeps without a buzzer. S/PDIF input and output functions are also supported, offering
easy connection of PCs to consumer electronic products such as AC3 decoders/speakers, and mini disk
devices.

The ALC850(D) supports host/soft audio from Intel ICHx chipsets, as well as audio controller-based
VIA/SiS/ALi/AMD/nVIDIA/ATI chipsets. Bundled Windows series (98/ME/NT/2000/XP) and Linux
drivers, EAX/Direct Sound 3D/I3DL2/A3D compatible sound effect utilities (supporting Karaoke,
26 types of environment sound emulation, 10-band equalizer), HRTF 3D positional audio, and optional
Dolby® Digital Live, providing an excellent entertainment package and game experience for PC users.