STAC9751T-CA3

Codecs Overview

The STAC9751T-CA3 is a value-line, full-duplex stereo audio CODEC conforming to AC'97 Rev 2.2 specifications. It integrates 18-bit ADCs and 20-bit DACs utilizing high-performance Sigma-Delta technology. The device features an integrated headphone amplifier, SPDIF output, and crystal elimination circuitry. It operates on a +3.3 V analog power supply and communicates via the five-wire AC-Link protocol. Key performance metrics include a 90 dB SNR for LINE-LINE output, 89 dB digital DAC SNR, and 85 dB digital ADC SNR. The component supports independent sample rates for ADCs and DACs through hardware sample rate converters.

Codecs Feature Summary

• Supports full-duplex stereo audio with integrated headphone drive capability eliminating the need for external amplifiers.
• Includes SPDIF output and General Purpose I/O for advanced architectural implementations and digital mixing.
• Features IDT Surround (SS3D) stereo enhancement and energy-saving dynamic power modes.
• Pin-compatible with legacy STAC9700/21/44/56/66 series devices.

Codecs Applications

• Motherboard audio integration
• PCI, AMR, CNR, or ACR expansion cards
• Daughter board audio solutions

Codecs Procurement Notes

Verify the specific ordering suffix CA3 against the manufacturer's current datasheet to confirm package type and lead-free status. Ensure compatibility with the system's AC'97 controller interface before procurement. Confirm that the +3.3 V analog supply requirement aligns with the target design constraints.

Codecs Selection Notes

Select this component for designs requiring AC'97 Rev 2.2 compliance with integrated headphone amplification. It is suitable for systems needing SPDIF output without external codecs. Consider the pin-compatibility with older STAC97xx series if migrating existing designs. Verify power supply requirements as this model specifically utilizes a +3.3 V analog supply compared to the +5 V option in the STAC9750.

Codecs Part Context

The STAC9751 is part of the IDT Value-Line two-channel AC'97 codec family, alongside the STAC9750. While functionally similar, the STAC9751 is distinguished by its +3.3 V analog power supply operation, whereas the STAC9750 supports +5 V. Both share identical pinouts and feature sets, allowing for direct substitution in designs where voltage levels permit.

Codecs Replacement Considerations

The STAC9750 is a pin-compatible alternative within the same family but requires a +5 V analog supply instead of +3.3 V. Other compatible parts include the STAC9700, STAC9721, STAC9744, STAC9756, and STAC9766, provided they meet the specific power and feature requirements of the application.