STAC9752AXTAED1X IDT, Integrated Device Technology Inc, STAC9752AXTAED1X Datasheet - Page 23
STAC9752AXTAED1X
Manufacturer Part Number
STAC9752AXTAED1X
Description
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet
1.STAC9752AXTAED1X.pdf
(106 pages)
Specifications of STAC9752AXTAED1X
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IDT™
AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK
STAC9752A/9753A
AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK
3.3.
Split Independent Power Supply Operation
In PC applications, one power supply input to the STAC9752A/9753A 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 STAC9752A/9753A 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 different 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 STAC9752A/9753A is not designed to operate for extended periods with only the ana-
log supply active.
23
STAC9752A/9753A
PC AUDIO
V 1.5 1206
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