STAC9752 datasheet(21/95 Pages) IDT

Numer części	STAC9752

Szczegółowy opis	TWO-CHANNEL, 20-BIT, AC??7 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING

PDF	95 Pages

Scroll/Zoom	100%

Producent	IDT [Integrated Device Technology]

Strona internetowa	http://www.idt.com

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21 / 95 page

STAC9752/9753

TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING

IDT™

STAC9752/9753

REV 3.3 1206

TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING

3.1.

Split Independent Power Supply Operation

In PC applications, one power supply input to the STAC9752/9753 may be derived from a supply

regulator and the other directly from the PCI power supply bus. When power is applied to the PC, the

regulated supply input to the IC will be applied some time delay after the PCI power supply. Without

proper on-chip partitioning of the analog and digital circuitry, some manufacturer's CODECs would

be subject to on-chip SCR type latch-up.

IDT’s STAC9752/9753 specifically allows power-up sequencing delays between the analog (AVddx)

and digital (VDddx) supply pins. These two power supplies can power-up independently and at dif-

ferent rates with no adverse effects to the CODEC. The IC is designed with independent analog and

digital circuitry that prevents on-chip SCR type latch-up.

However, the STAC9752/9753 is not designed to operate for extended periods with only the analog

supply active.

STAC9752 Arkusz danych(PDF) 21 Page - Integrated Device Technology