|Category||Multimedia => Audio => Codecs => AC97 Codec|
|Company||C-Media Electronics (CMEI)|
|Datasheet||Download CMI9738_4CH datasheet
Versatility 4CH AC97 CODEC, applicable for currently mainstream MB chipsets of Intel, VIA, Ali, and SIS. CMI9738 is ideal for PC2001-compliant desktops, notebooks, and home entertainment PCs where high-quality audio is a must. 4CH Playback The specially-designed 4CH hardware architecture of CMI9738 allows all types of south bridge to playback 4CH audio, thus helping commonplace south bridge get rid of the limitation of 2CH audio playback capability (patent pending both in Taiwan and United States). Cost-effectiveness As to the cost concern, CMI9738 integrates the earphone buffer, analog CD differential interface, and analog switch for rear channel audio to Line-in. Simply by using 0.1uf decoupling capacitor, CMI9738 meets PC2001 frequency response requirements. packaging option, CMI9738 also offers SOP 24pin packaging, which helps to further cut the cost. More Audio Option Last but not least, CMI9738 provides Sensaura® 3D audio option. beyond general expectation. In that regard,Features
Intel AC'97 Rev 2.2 compatible AC-Link Protocol compliance Full-Duplex Codec Earphone Buffer Line-in/rear out share jack capability 4 channels DAC 48 LQFP Package and 24-Lead TSSOP Package Meet Microsoft's PC2001 requirements Sensaura® 3D Enhancement(optional)
C-MEDIA Electronics Inc. 6F, 100, Sec. 4, Civil Boulevard, Taipei, Taiwan, R.O.C. 106 TEL: 886-2-8773-1100 FAX: 886-2-8773-2211 E-mail:email@example.comDVdd1 XTL_IN XTL_OUT DVss1 SDATA_OUT BIT_CLK DVss2 SDATA_IN DVdd2 SYNC RESET# NC
LINE_IN_R LINE_IN_L NC MIC1 CD_R CD_GND CD_L NC AUX_IN_R AUX_IN_L NC
SDATA_IN SYNC RESET# AUX_IN_L AUX_IN_R CD_L CD_GND CD_R MIC1 LINE_IN_L LINE_IN_R VREF_OUT
BIT_CLK SDATA_OUT XTL_OUT XTL_IN DVsdd Vss TEST0# AVdd LINE_OUT_R LINE_OUT_L XADCHR XADCHL
PIN Signal Name DVdd1 XTL_IN XTL_OUT DVss1 SDATA_OUT BIT_CLK DVss2 SDATA_IN DVdd2 SYNC RESET# NC AUX_IN_L AUX_IN_R NC CD_L CD_GND CD_R MIC1 NC LINE_IN_L LINE_IN_R PIN Signal Name AVss1 NC Vrefout AFILT2 NC LINE_OUT_L LINE_OUT_R NC AVdd2 REAR_OUT_L TEST0# REAR_OUT_R AVss2 NC RESERVED NC
PIN Signal Name SDATA_IN SYNC RESET# AUX_IN_L AUX_IN_R CD_L CD_GND CD_R MIC1 LINE_IN_L LINE_IN_R VREF_OUT AFILT1 AFILT2 LINE_OUT_L LINE_OUT_R AVdd TEST0# Vss DVsdd XTL_IN XTL_OUT SDATA_OUT BIT_CLK
The CMI9738 mixer is designed to the AC'97 specification to manage playback and record of all digital and analog audio sources in the PC environment. These includeˇG System audioˇG digital PCM input and output for business, games, and multimedia CD/DVDˇG analog CD/DVD-ROM Redbook audio with internal connections to Codec mixer Mono microphoneˇG choice of desktop or headset mic, with programmable boost and gain Speakerphone ˇG use of system mic & speakers for telephony, DSVD, and video conferencing Stereo line inˇG analog external line level source from consumer audio, video camera, etc AUX/synthˇGanalog FM or wavetable synthesizer, or other internal source
desktop microphone external audio source audio from CD-ROM drive
from mic jack from line in jack cable from CD-ROM internal connector AC-link AC `97 internal to output jack to output jack AC-link
upgrade synth or other external source digital audio output from AC '97 Controller mix of all sources stereo mix of all sources (front channel) stereo output of rear (surround) channel digital audio input AC '97 Controllerany mono or stereo sourcemono or stereo mix of all sources
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