STAC9751XXTAEC1X IDT, Integrated Device Technology Inc, STAC9751XXTAEC1X Datasheet - Page 19

• Manufacturer Part Number: STAC9751XXTAEC1X
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of STAC9751XXTAEC1X

• Single Supply Voltage (typ): 3.3/5V
• Single Supply Voltage (min): 3.135V
• Single Supply Voltage (max): 3.465/5.25V
• Package Type: TQFP
• Lead Free Status / RoHS Status: Compliant

3. TYPICAL CONNECTION DIAGRAM
Note:
IDT™
VALUE-LINE TWO-CHANNEL AC’97 CODECS
STAC9750/9751
VALUE-LINE TWO-CHANNEL AC’97 CODECS
1.
2.
3.
4.
See Appendix A for specific connection requirements prior to operation.
See Figure 24 on page 70 for split supply connections.
Pin 48: To Enable SPDIF, use an 1 KW-10 KW external pulldown. To Disable SPDIF, use an 1 KW-10 KW external pullup.
Do NOT leave Pin 48 floating.
The CD_GND signal is an AC signal return for the two CD input channels. It is normally biased at about 2.5V. The name of
the pin in the AC97 specification is CD_GND, and this has confused many designers. It should not have any DC path to
GND. Connecting the CD_GND signal directly to ground will change the internal bias of the entire CODEC, and cause
significant distortion. If there is no analog CD input, then this pin can be No-Connect.
*OPTIONAL
0.1 µF
820 pF
820 pF
0.1 µF
1 µF*
12
13
14
15
16
17
18
19
20
21
22
23
24
32
29
30
PC_BEEP
PHONE
AUX_L
AUX_R
VIDEO_L
VIDEO_R
CD_L
CD_GND
CD_R
MIC1
MIC2
LINE_IN_L
LINE_IN_R
CAP2
AFILT1
AFILT2
1 µF
Figure 9.
25
AVdd1
26
AVss1
AVdd2
STAC9751 Typical Connection Diagram
AVss2
38
0.1 µF
42
STAC9751
DVss1
4
2 Ω*
0.1 µF
Ferrite Bead*
19
DVss2
7
1
DVdd1
*Suggested
DVdd2
10 µF
9
LINE_OUT_R
SDATA_OUT
LINE_OUT_L
MONO_OUT
HP_OUT_R
HP_COMM
HP_OUT_L
SDATA_IN
VREFOUT
XTL_OUT
BIT_CLK
RESET#
XTL_IN
GPIO1
GPIO0
SPDIF
SYNC
EAPD
VREF
CID0
CID1
plane as close to codec
NC
NC
NC
0.1 µF
Ground
*Terminate ground
Analog
as possible
2
3
5
6
8
10
11
45
46
47
28
27
31
33
34
48
40
44
43
35
36
37
39
41
3.3V ± 5%
STAC9750/9751
24.576 MHz
0.1 µF
27 pF
27 pF
Ground
Digital
Filter
EMI
22 Ω
*OPTIONAL
*OPTIONAL
27 pF
1 µF*
PC AUDIO
V 5.8 103106