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Renesas IDTSTAC9752AXNAED1X
- Part No.:
- IDTSTAC9752AXNAED1X
- Manufacturer:
- Renesas
- Category:
- CODECS
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
IDTSTAC9752AXNAED1X.pdf
- Description:
- IC CODEC AC'97 MIC/JACK 32-QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,271
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Product details
Overview
IDTSTAC9752AXNAED1X from IDT is a 20-bit, full-duplex AC'97 Rev 2.3-compliant audio codec IC designed as a primary or secondary analog audio component in PC motherboard and add-in card audio subsystems. It integrates stereo 20-bit ADCs and DACs, supports independent sample rates (48 kHz, 44.1 kHz, 32 kHz, etc.), delivers 94 dB LINE_OUT SNR, and provides 50 mW headphone drive per channel without external amplification.
For engineers reviewing the IDTSTAC9752AXNAED1X datasheet, IDTSTAC9752AXNAED1X pinout, IDTSTAC9752AXNAED1X application, or IDTSTAC9752AXNAED1X equivalent, key selection considerations include its +5 V analog supply requirement, 48-pin LQFP package, Universal Jacks™ sensing capability, SPDIF digital output, and compatibility with multi-CODEC AC-3 6-channel DVD playback configurations.
Technical Context
The IDTSTAC9752AXNAED1X implements a dual-path Σ∆ architecture with separate 20-bit stereo ADC and DAC blocks, each operating at variable sample rates under AC-Link control. Its mixer supports analog source routing to LINE_OUT, HP_OUT, and MONO_OUT while enabling simultaneous mono mic + stereo mixer recording for digital-ready paths.
It uses proprietary current- and impedance-based internal jack sensing on HP_OUT, LINE_OUT, and MIC inputs, managed via AC'97 2.3 Extended Paging Registers. The device supports both analog and digital PC BEEP, includes IDT Surround 3D (SS3D) stereo enhancement, and operates with split +5 V analog / +3.3 V digital power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog LINE_OUT SNR | 94 dB - Enables high-fidelity line-level output with minimal noise floor in PC audio front-panel or rear-I/O designs. |
| Digital DAC SNR | 92 dB - Ensures clean digital-to-analog conversion for PCM playback streams without audible quantization artifacts. |
| Digital ADC SNR | 85 dB - Supports clear voice capture and stereo line-in recording with adequate dynamic range for consumer audio. |
| Full-scale THD | 0.002% - Guarantees low distortion at maximum signal levels across both DAC and ADC paths. |
| Headphone Drive | 50 mW per channel - Directly drives 32 Ω headphones without external amplifier, reducing BOM cost and board space. |
| Microphone Boost | 0/10/20/30 dB selectable - Configurable gain staging for mono/stereo mic inputs to match varying electret capsule sensitivities. |
| SPDIF Output | 20-bit digital - Provides bitstream-compatible S/PDIF output for external DACs or AV receivers in DVD/AC-3 systems. |
Pinout & Package
Packaged in a 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch), the IDTSTAC9752AXNAED1X conforms to AC'97 mechanical and thermal standards for motherboard placement on PCI, AMR, CNR, MDC, or ACR cards.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1–3, 5–6, 8–9, 11–12, 14–15, 17–18, 20–21, 23–24, 26–27, 29–30, 32–33, 35–36, 38–39, 41–42, 44–45, 47–48 | Power/Ground/No Connect | Includes dedicated AVDD (+5 V), DVDD (+3.3 V), AGND, DGND, and NC pins-requires separate analog/digital ground planes and decoupling per AC'97 layout rules. |
| 4, 7, 10, 13, 16, 19, 22, 25, 28, 31, 34, 37, 40, 43, 46 | Analog I/O | Supports LINE_IN_L/R, MIC_IN_L/R, HP_OUT_L/R, LINE_OUT_L/R, MONO_OUT, PHONE, CD, AUX - enables full analog audio routing with Universal Jacks™ sensing. |
| SYNC, BIT_CLK, SDATA_OUT, SDATA_IN, RESET# | AC-Link Interface | 5-wire serial interface compliant with AC'97 Rev 2.3 timing; connects directly to AC'97 controller (e.g., Intel ICH) without level-shifting. |
Key Features
| Feature | Design Value |
|---|---|
| Universal Jacks™ with internal sensing | Detects impedance/current on HP_OUT, LINE_OUT, and MIC inputs to auto-configure driver behavior and enable plug-and-play jack sharing. |
| Extended AC'97 2.3 Paging Registers | Provides non-volatile storage for jack sense results, SoftEQ parameters, and BIOS-configured gain/attenuation settings-enables zero-touch OS audio setup. |
| IDT Surround 3D (SS3D) | Real-time stereo enhancement algorithm that improves perceived speaker separation without requiring additional hardware or DSP resources. |
| Digital PC BEEP | Generates system beep tones digitally within the CODEC, eliminating need for analog beep generator circuitry on motherboard. |
| Crystal Elimination Circuit | Allows operation without external 12.288 MHz crystal by deriving clocks from AC-Link BIT_CLK-reduces component count and layout complexity. |
Applications
| Desktop Motherboard Audio | PCI Audio Add-in Card |
|---|---|
Use Scenario: Integrated audio solution on ATX/BTX motherboards supporting front-panel headphone/mic jacks and rear I/O line-out. IC Role / Device Role / Timing Role: Primary AC'97 analog codec interfacing with Intel ICH southbridge via 5-wire AC-Link; handles all analog I/O, mixing, and jack sensing. Use Value: Eliminates external headphone amplifier and analog beep circuit; reduces BOM by integrating stereo mic preamp with 30 dB boost and Universal Jacks™ sensing logic. |
Use Scenario: Low-cost stereo audio expansion card for legacy PCI slots in industrial PCs or kiosks requiring SoundBlaster®-compatible playback/recording. IC Role / Device Role / Timing Role: Standalone AC'97 codec operating as primary audio device with configurable sample rates and SPDIF output for external DACs. Use Value: Delivers 94 dB LINE_OUT SNR and 50 mW headphone drive-enables direct connection of speakers/headphones without signal conditioning stages. |
| DVD Playback System | Multi-CODEC AC-3 Configuration |
Use Scenario: Secondary audio codec in dual-CODEC setup for true 6-channel AC-3 decoding and playback in DVD-ROM-equipped desktops. IC Role / Device Role / Timing Role: Secondary AC'97 Rev 2.3 codec synchronized to primary STAC9750/52/66 via AC-Link; handles rear/surround channel DAC output. Use Value: Enables full Dolby Digital 5.1 playback using standard AC'97 infrastructure-no custom ASIC or FPGA required. |
Use Scenario: Primary codec paired with STAC9700/21/56 as secondary in OEM systems requiring flexible audio topology (e.g., front mic + rear line-in + SPDIF out). IC Role / Device Role / Timing Role: Master CODEC managing extended paging registers and jack sense data shared across multiple CODECs in AC'97 multi-device topology. Use Value: Allows BIOS to auto-configure all connected codecs based on sensed jack presence-eliminates manual driver configuration for end users. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar AC'97 audio codec applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STAC9753A | +3.3 V analog supply (vs. +5 V for IDTSTAC9752AXNAED1X); identical pinout, register map, and feature set. | Used where lower analog power consumption and reduced heat dissipation are prioritized over legacy +5 V rail compatibility. | Select STAC9753A when system uses +3.3 V analog domain; otherwise IDTSTAC9752AXNAED1X maintains backward compatibility with existing +5 V designs. |
| STAC9766 | Higher LINE_OUT SNR (96 dB), integrated 3D stereo enhancement, and enhanced jack sensing resolution-but requires different power sequencing and register initialization. | Suitable for premium audio implementations requiring improved dynamic range and advanced spatial processing. | Choose STAC9766 only if SNR >95 dB and SS3D enhancements are critical; IDTSTAC9752AXNAED1X remains optimal for cost-sensitive mainstream PC audio. |
Compared with STAC9753A and STAC9766, IDTSTAC9752AXNAED1X offers the lowest system integration barrier for legacy +5 V motherboard designs while delivering proven 94 dB SNR, Universal Jacks™ reliability, and full AC'97 2.3 multi-CODEC interoperability without firmware rework.
Availability
IDTSTAC9752AXNAED1X is available at Aetrix Electronics and suitable for desktop motherboard audio, PCI add-in cards, DVD playback systems, and multi-CODEC AC-3 configurations requiring stable component supply and long-term lifecycle support.
Supply support for IDTSTAC9752AXNAED1X includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
IDT (Integrated Device Technology) is a fabless semiconductor company specializing in timing, memory interface, RF, and audio solutions for computing and communications infrastructure.
The STAC97xx family was designed specifically for AC'97 Rev 2.3-compliant PC audio subsystems, targeting cost-effective, high-SNR, and feature-rich analog codec integration in motherboards and add-in cards.
FAQ
What is the analog power supply requirement for IDTSTAC9752AXNAED1X?
IDTSTAC9752AXNAED1X requires a +5 V analog supply (AVDD) as specified in the datasheet and ordering code suffix "XNAED1X". This distinguishes it from the STAC9753A variant, which uses +3.3 V analog power. Using incorrect voltage risks permanent damage or degraded SNR performance. Always verify AVDD rail stability and decoupling per Section 3.3 of the IDTSTAC9752AXNAED1X datasheet.
Does IDTSTAC9752AXNAED1X support S/PDIF output?
Yes, IDTSTAC9752AXNAED1X includes a 20-bit S/PDIF digital output compliant with IEC 60958, enabling bitstream transmission to external AV receivers or DACs. The SPDIF signal is derived from the internal DAC path and can be enabled/disabled via Extended Paging Register 0x01h[7]. This feature is essential for DVD AC-3 passthrough and high-fidelity digital audio routing in PC systems.
How does Universal Jacks™ functionality work in IDTSTAC9752AXNAED1X?
IDTSTAC9752AXNAED1X implements Universal Jacks™ using proprietary current- and impedance-sensing circuits on HP_OUT, LINE_OUT, and MIC inputs. Sensing results are stored in AC'97 Extended Paging Registers (e.g., Reg 0x7Ch/7Eh), allowing BIOS or drivers to auto-detect jack insertion and configure routing/gain without user input. This enables true plug-and-play microphone/headphone interchangeability on shared front-panel connectors.
Is IDTSTAC9752AXNAED1X pin-compatible with other STAC97xx devices?
IDTSTAC9752AXNAED1X is 100% pin-compatible with STAC9750, STAC9752, and STAC9766 in the 48-pin LQFP package, as confirmed in the datasheet Feature section and Table 29. This allows drop-in replacement in existing layouts, though register initialization and power sequencing may differ-always validate firmware compatibility before substitution.
What sample rates does IDTSTAC9752AXNAED1X support?
IDTSTAC9752AXNAED1X supports hardware-based sample rates of 48 kHz, 44.1 kHz, 32 kHz, 22.05 kHz, 16 kHz, 11.025 kHz, and 8 kHz for both ADC and DAC paths, with independent rate selection. Additional rates (e.g., 96 kHz) are supported via soft audio drivers but require host-side resampling. All rates operate at native 20-bit resolution without dithering or truncation.
IDTSTAC9752AXNAED1X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- Audio, AC '97
- Data Interface:
- Serial
- Resolution (Bits):
- 20 b
- Number of ADCs / DACs:
- 2 / 2
- Sigma Delta:
- Yes
- S/N Ratio, ADCs / DACs (db) Typ:
- 85 / 92
- Dynamic Range, ADCs / DACs (db) Typ:
- -
- Voltage - Supply, Analog:
- 3.14V ~ 3.47V; 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 3.14V ~ 3.47V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VFQFPN (5x5)
IDTSTAC9752AXNAED1X FAQ
1.How can I place an order for IDTSTAC9752AXNAED1X through Aetrix?
Please submit a Request for Quotation (RFQ) for IDTSTAC9752AXNAED1X on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for IDTSTAC9752AXNAED1X reliable?
The price and inventory of IDTSTAC9752AXNAED1X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDTSTAC9752AXNAED1X is usually 5 days.
3.What payment methods are accepted for IDTSTAC9752AXNAED1X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDTSTAC9752AXNAED1X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDTSTAC9752AXNAED1X?
IDTSTAC9752AXNAED1X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDTSTAC9752AXNAED1X order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for IDTSTAC9752AXNAED1X?
For technical support, including IDTSTAC9752AXNAED1X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDTSTAC9752AXNAED1X requirements.
6.How does Aetrix verify that IDTSTAC9752AXNAED1X is sourced from the original manufacturer or authorized distributors?
All IDTSTAC9752AXNAED1X products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that IDTSTAC9752AXNAED1X meets industry standards.
7.What is the process for return or replacement of IDTSTAC9752AXNAED1X?
All IDTSTAC9752AXNAED1X units undergo pre-shipment inspection (PSI). If there is an issue with IDTSTAC9752AXNAED1X, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The IDTSTAC9752AXNAED1X part is unused and in its original packaging.
Return procedure for IDTSTAC9752AXNAED1X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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