STAC9767T-CA3

Codecs Overview

The STAC9767T-CA3 is a stereo AC'97 audio codec manufactured by Sigmatel. It conforms to the Analog Component Specification of AC'97 (Audio Codec 97 Component Specification Rev. 2.1). The device integrates mixed-signal solutions including Sigma-Delta technology for high-performance digital-to-analog conversion. It features an 18-bit full-duplex stereo ADC and DACs with a Signal-to-Noise Ratio (SNR) exceeding 95 dB. The component supports multiple power supply options at 3.3V and includes energy-saving power-down modes. It communicates via the five-wire AC-Link interface with compatible controllers or advanced core logic chipsets.

Codecs Feature Summary

• Integrates proprietary Sigma-Delta technology to achieve high-fidelity audio performance with SNR in excess of 95 dB.
• Supports multi-codec configurations as a secondary codec alongside primary codecs like the STAC9700 series to enable up to six-channel output.
• Includes Sigmatel's 3D Stereo Enhancement (SS3D) and an extra true line-level output channel for headphones or speaker amplifiers.
• Features external amplifier power down control (EAPD) and pin compatibility with other models in the STAC9700/44/45 family.

Codecs Applications

• Motherboard integration for PC audio systems requiring AC'97 compliance.
• Daughter boards and add-on cards for desktop computer audio expansion.
• AMR (Audio Modem Riser) or MDC (Modem Riser) card implementations.
• DVD applications requiring AC-3 playback through multi-codec configurations.

Codecs Procurement Notes

Verify the specific suffix 'CA3' against official Sigmatel documentation to confirm package type, temperature range, and lead finish specifications. Ensure the source document explicitly identifies this part number rather than generic family listings. Confirm RoHS compliance status if required for your manufacturing process, as datasheets may vary by production batch.

Codecs Selection Notes

Select this component when designing systems that strictly adhere to the AC'97 Rev. 2.1 specification. It is suitable for applications requiring a secondary audio codec to expand channel count beyond standard stereo. Verify that the host controller supports the five-wire AC-Link protocol. Consider the 3.3V power supply requirements and ensure thermal management aligns with commercial temperature grades.

Codecs Part Context

This component belongs to the Sigmatel STAC97xx series of audio codecs. These devices are designed for general-purpose stereo audio processing in personal computers and consumer electronics. The STAC9767 specifically serves as a versatile solution for integrating high-quality audio into motherboards and riser cards while maintaining compatibility with legacy AC'97 architectures.

Codecs Replacement Considerations

The datasheet indicates pin compatibility with the STAC9700, STAC9744, and STAC9745. Verify functional equivalence and electrical parameters before substituting these parts. No other direct replacement part numbers are confirmed in the provided documentation.