STAC9766 IDT [Integrated Device Technology], STAC9766 Datasheet - Page 17

• Manufacturer Part Number: STAC9766
• Manufacturer: IDT [Integrated Device Technology]

3. TYPICAL CONNECTION DIAGRAM
IDT™
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
STAC9766/9767
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
Pin 48: To Enable SPDIF, use a 1K - 1 0 K external pulldown. To Disable SPDIF, use a 1K - 1 0 K
lup. 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
1 µF*
820 pF
820 pF
0.1 µF
0.1 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
25
AVdd1
26
AVss1
Figure 9. Typical Connection Diagram
AVdd2
AVss2
38
0.1 µF
42
*OPTIONAL
STAC9767
DVss1
4
2
*
0.1 µF
Ferrite Bead
DVss2
7
17
1
DVdd1
DVdd2
9
LINE_OUT_R
SDATA_OUT
LINE_OUT_L
1 µF
MONO_OUT
HP_OUT_R
HP_OUT_L
HP_COMM
SDATA_IN
XTL_OUT
VREFOUT
BIT_CLK
RESET#
XTL_IN
GPIO1
GPIO0
SPDIF
SYNC
EAPD
VREF
CID0
CID1
plane as close to codec
0.1 µF
NC
NC
NC
Ground
*Terminate ground
Analog
as possible
2
3
5
6
8
10
11
45
46
47
28
27
31
33
34
48
44
43
35
36
37
39
40
41
3.3V ± 5%
0
Ground
Digital
STAC9766/9767
OPTIONAL
HP_COMM should be tied to
ground at the headphone pin.
TUNE TO LAYOUT
22
24.576 MHz
(Near Clk source)
1 µF
27 pF
27 pF
27 pF
Filter
EMI
CLOCK_IN*
*Add resistive divider
when using 5V clock.
external pul-
PC AUDIO
V 7.4 12/06