CMI9738 Datasheet, PDF (1/36 Pages) List of Unclassifed Manufacturers – Integrated Multi-channel AC97

CMI 9738
Integrated Multi-channel AC‘97
CMI9738 4CH Audio Codec
1. Description and Overview
Preliminary
Specification
Versatility
CMI9738 is a 4CH AC97 CODEC, applicable for
Alongside offering standard LQFP 48pin
packaging option, CMI9738 also offers SOP
currently mainstream MB chipsets of Intel, VIA, 24pin packaging, which helps to further cut the
Ali, and SIS. CMI9738 is ideal for
PC2001-compliant desktops, notebooks, and
home entertainment PCs where high-quality
cost.
More Audio Option
Last but not least,
CMI9738
provides
audio is a must.
4CH Playback
The specially-designed
4CH
hardware
Sensaura® 3D audio option. In that regard,
the audio quality of CMI9738 is fabulous
beyond general expectation.
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.
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)
Pin Block Diagram
37
38
39
40
41
42
NC
AVdd2
REAR_OUT_L
TEST0#
REAR_OUT_R
43 ^AVss2
44
45
46
47
48
NC
NC
RESERVED
RESERVED
NC
NC
U2
CMI9738-LQFP-48
24
LINE_IN_R
LINE_IN_L
NC
MIC1
CD_R
23
22
21
20
19
CD_GND ₁₈
CD_L
NC
NC
AUX_IN_R
AUX_IN_L
17
16
15
14
13
NC
1
2
3
SDATA_IN
SYNC
4
5
6
7
8
RESET#
AUX_IN_L
AUX_IN_R
CD_L
CD_GND
9
10
11
12
CD_R
MIC1
LINE_IN_L
LINE_IN_R
VREF_OUT
BIT_CLK
SDATA_OUT
24
23
22
XTL_OUT
XTL_IN
DVsdd
Vss
TEST0#
21
20
19
18
17
AVdd
LINE_OUT_R
LINE_OUT_L
XADCHR
XADCHL
16
15
14
13
C-MEDIA Electronics Inc.
6F, 100, Sec. 4, Civil Boulevard, Taipei, Taiwan, R.O.C. 106
TEL: [phone] FAX: [phone] E-mail:[e-mail]
Revision Date Apr./2002
Revision 1.1