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SigmaTel, Inc.
Data Sheet
STAC9721
6
04/07/00
04/07/00
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.
VIDEO_L
VIDEO_R
AUX_L
AFILT1
AFILT2
AVss1
AVss2
DVss1
DVss2
AVdd1
AVdd2
DVdd1
DVdd2
Ferrite Bead *
2 ohm *
0.1uF
10uF
1uF
0.1uF
0.1uF
0.1uF
820pF
29
30
14
17
16
25
38
1
9
7
4
42
26
3
2
CAP2
XTL_OUT
XTL_IN
3.3V or 5V ± 5%
24.576MHz
32
1uF
SigmaTel
STAC9721/23
28
Vrefout
Vref
27
1uF
0.1uF
27pF
27pF
LINE_OUT_L
LINE_OUT_R
MONO_OUT
35
36
37
LINE_IN_R
24
LINE_IN_L
23
PHONE
13
PC
_BEEP
12
MIC2
22
AUX_R
15
MIC1
21
6
5
8
11
10
SDATA_OUT
SDATA_IN
RESET
SYNC
BIT_CLK
CD_GND
CD_R
20
19
18
CD_L
Analog Gnd
Digital Gnd
NOTE: Pins 31, 33, 34, 40
43, 44, and 48 are No Connects
* Suggested
** Teminate ground
plane as close to power
supply as possible
LNLVL_OUT_L
LNLVL_OUT_R
39
41
46
45
CID1
CID0
820pF
APOP
EAPD
34
47
CAP1
31
CAP3
33
0.1uF
Optional Anti-Pop Circuit
100uF
10uF
27pF
22 ohms
EMI
Filter