STAC9721 Datasheet, PDF (6/48 Pages) List of Unclassifed Manufacturers – Stereo AC 97 Codec With Multi-Codec Option

SigmaTel, Inc.
Data Sheet
STAC9721
Figure 3. Connection Diagram –
See Appendix A for an alternative connection diagram when using separate supplies.
See Appendix B for specific connection requirements prior to operation.
2 ohm * Ferrite Bead * _{* Suggested}
3.3V or 5V ± 5%
0.1uF
1uF
0.1uF
0.1uF
10uF
0.1uF
25
AVdd1
38
AVdd2
1
DVdd1
9
DVdd2
2
XTL_IN
12 _{PC_BEEP}
13
PHONE
14
AUX_L
15
AUX_R
16
VIDEO_L
17
VIDEO_R
18 _{CD_L}
SigmaTel
STAC9721/23
XTL_OUT 3
SDATA_OUT ⁵
6
BIT_CLK
8
SDATA_IN
10
SYNC
11
RESET
45
CID0
46
CID1
27pF
24.576MHz
27pF
22 ohms
EMI
Filter
27pF
0.1uF
19 _{CD_GND}
20
CD_R
21
MIC1
22
MIC2
23 _{LINE_IN_L}
24 _{LINE_IN_R}
32
CAP2
1uF
27
Vref
0.1uF
1uF
28
Vrefout
31
CAP1
33
CAP3
APOP ³⁴
47
EAPD
35
LINE_OUT_L
Optional Anti-Pop Circuit
100uF
10uF
820pF
29 _AFILT1
820pF
30
AFILT2
AVss1
26
NOTE: Pins 31, 33, 34, 40
43, 44, and 48 are No Connects
36
LINE_OUT_R
37
MONO_OUT
AVss2 DVss1
42 4
DVss2 LNLVL_OUT_L
7
39
LNLVL_OUT_R
41
** Teminate ground
plane as close to power
supply as possible
Analog Gnd
Digital Gnd
6
04/07/00
04/07/00