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ALC250 Professional AC'97 Rev Audio CODEC 2.3

Stereo audio CODEC designed for computer multimedia systems

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The ALC250 integrates proprietary converter technology to attain a SNR (100 dB), and an Universal Audio Jack for enhanced user experience. The ALC250 AC'97 CODEC works with more codec extensions with particular variable sampling rates and integrated 3D effects. 2 pairs of stereo outputs with separate volume controls, a mono output, and more stereo and mono inputs, with gain, flexible mixing, and mute functions offers a full integrated audio solution for computers.

The ALC250 CODEC supports host or soft audio from Intel ICHx chipsets or audio controller based SIS, VIA, ALI, AMD, nVIDIA, ATI chipsets. Integrated Windows series drivers (Windows 98, Windows ME, Windows NT, Windows 2000, Windows XP), EAX Direct Sound 3D, I3DL2, A3D compatible sound effects options.


- Integrated 7-band digital hardware equalizer to enhance speaker response
- Single chip with S/N ratio (100 dB)
- Fits performance requirements for audio on PC99, 2001 systems
- Fits Microsoft WHQL, WLP 2.0 audio requirements
- 20-bit DAC and 18-bit ADC resolution
- Complies with AC'97 Rev 2.3 specifications
- LINE, HP-OUT, MIC-IN and LINE-IN sensing
- 14.318MHz -> 24.576MHz PLL to eliminate crystal
- S/PDIF output
- 12.288MHz BITCLK input
- Embedded PCBEEP generator to save buzzer
- Interrupt capability
- Page registers and Analog Plug and Play
- Three analog line level stereo inputs with 5-bit volume control: LINE_IN, AUX, CD
- Great quality differential CD input
- 2 analog line level mono inputs: PHONE-IN, PCBEEP
- 2 software selectable MIC inputs
- +6, 12, 20, 30dB preamplifier for MIC
- Stereo output with 6-bit volume control
- Mono output with 5-bit volume control
- Headphone output with 50mW, 20Ohm amplifier
- 3D Stereo Enhancement
- CODEC extension capability
- External Amplifier Power Down (EAPD) ability
- Power management and improved power saving features
- Stereo MIC record for AEC, BF application
- DC Voltage volume control
- Auxiliary power to support Power-Off CD
- Adjustable VREFOUT control
- 2 Universal Audio Jacks (UAJ) for front panel
- Supports 32K, 44.1K, 48K, 96KHz S, PDIF output
- Supports 32K, 44.1K, 48KHz S, PDIF input
- Power support: Digital: 3.3V; Analog: 3.3V/5V
- Standard 48-pin LQFP package
- EAX 1.0 and 2.0
- Direct Sound 3D
- A3D
- I3DL2
- Sensaura 3DPA Enhancement (optional)
- 10-band software equalizer
- Voice cancellation and key shifting in Karaoke mode
- AVRack Media Player
- Configuration Panel for enhanced user experience


- Multimedia PCs
- 3D PC games
- Information appliances (IA)
- Voice recognition

Name ALC250 Professional AC'97 Rev Audio CODEC
Version 2.3
Developer | see all products from this developer
Product Homepage ALC250 Professional AC'97 Rev Audio CODEC
License Free (Freeware)
Last Week Downloads 2
All Time Downloads 23,302
Filename productsView.aspx?Langid=1&PNid=23&PFid=29&Level=5&Conn=4&ProdID=55
Filesize 2.5MB
OS Support Win 98/Vista/2000/ME/XP
Category Audio & Video


Old Versions

Software Date Added
ALC250 Professional AC'97 Rev Audio CODEC February 12, 2010 - Latest Version

Download the free ALC250 Professional AC'97 Rev Audio CODEC