ponent Specification Rev. 2.3). The STAC9766/67
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technol-
ogy The AC鈥?7 codec is designed to achieve a
DAC SNR in excess of 103dB. The DACs, ADCs,
and mixer are integrated with analog I/Os, which
include four analog line-level stereo inputs, two
analog line-level mono inputs, two stereo outputs,
and one mono output channel. The STAC9766/67
includes digital input/output capability for support
of modern PC systems with an output that sup-
ports the SPDIF format. The STAC9766/67 is a
standard 2-channel stereo codec. With SigmaTel鈥檚
headphone drive capability, headphones can be
driven with without an external amplifier.
The STAC9766/67 may be used as a secondary
codec, with the STAC9700/21/56/08/84/50/52 as
the primary, in a multiple codec configuration con-
forming to the AC'97 Rev. 2.3 specification. This
configuration can provide true six-channel, AC-3
playback required for DVD applications. The
STAC9766/67 communicates via the five-wire AC-
Link to any digital component of AC'97 providing
flexibility in the audio system design. Packaged in
an AC'97 compliant 48-pin TQFP, the STAC9766/
67 can be placed on the motherboard, daughter
boards, PCI, AMR, CNR, MDC or ACR cards.
The STAC9766/67 provides variable sample rate
Digital-to-Analog (DA) and Analog-to-Digital (AD)
conversion, mixing, and analog processing.
FEATURES
聞
For Rev. CC1 parts and beyond
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High performance
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technology
聞
AC鈥?7 Rev 2.3 Complaint
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20-bit full duplex stereo ADC & DACs
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Independent sample rates for ADC & DACs
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5-Wire AC-Link protocol compliance
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20-Bit SPDIF Output
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Full Stereo Microphone Pre-Amp
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Internal Jack Sensing on Headphone &
Line_Out
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聞
聞
聞
聞
聞
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Internal Microphone Input Sensing
Digital PC Beep Option
Extended AC鈥?7 2.3 Paging Registers
Digital-ready status
General purpose I/O
Crystal Elimination Circuit
Headphone drive capability (50mW)
0, 10db, 20db, and 30 dB microphone
boost capability
analog power supply options
聞
+3.3V (STAC9767) and +5V (STAC9766)
聞
Pin compatible with STAC9700/21/56
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100% compatible with STAC9750/52
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SigmaTel Surround (SS3D) Stereo
Enhancement
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Energy saving dynamic power modes
Multi-Codec option (Intel AC'97 rev 2.3)
Six analog line-level inputs
103dB SNR LINE-LINE
ORDERING INFORMATION
Part Number
STAC9766T
STAC9767T
2-9766-P1-4.0-0802
Package
48-pin TQFP 7mm x 7mm x 1.4mm
48-pin TQFP 7mm x 7mm x 1.4mm
Temp Range
0擄 C to +70擄 C
0擄 C to +70擄 C
Supply Range
DVdd = 3.3V, AVdd = 5.0V
DVdd = 3.3V, AVdd = 3.3V
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