STAC9752A datasheet(92/106 Pages) IDT

Part #	STAC9752A

Description	AC??7 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK

PDF	106 Pages

Scroll/Zoom	100%

Manufacturer	IDT [Integrated Device Technology]

Direct Link	http://www.idt.com

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92 / 106 page

STAC9752A/9753A

AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK

PC AUDIO

IDT™

STAC9752A/9753A

V 1.5 1206

AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK

11.3. Pin Description for the 32-pad QFN Package

Figure 25. STAC9752A/9753A 32 pad QFN Pin Description Drawing

Pin 32: To Disable SPDIF, use an 1K

Ω -10KΩ external pullup resistor.

Pin 11: 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 AC’97 specification is CD_GND, and this has con-

fused 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.

32 pad QFN

HP_R

HP_L

AVDD2

MONO_OUT

AVSS

GPIO3

SPDIF-OUT

EAPD/GPIO4

13 MIC 1

14 MIC 2

15 LINE_IN_L

16 LINE_IN_R

12 CD_R

11 CD_GND

9 PHONE

CD_L

STAC9752A Datasheet(PDF) 92 Page - Integrated Device Technology