CS4299-XQ Stereo AC'97 Audio Codec | Cirrus Logic
MPN： CS4299-XQ ✗ 停產CS4299-XQ 概覽
An audio codec is a mixed-signal integrated circuit that converts digital audio data into analog signals and converts analog sound into a digital format for processing by a host controller. The CS4299-XQ is an AC'97 codec, so its principal interfaces are the Audio Codec '97 serial link and analog audio connections rather than a modern USB or I2S audio interface. AC'97 was designed for PC multimedia architectures and supports synchronized audio, modem, and control functions through a defined digital bus.
According to the Cirrus Logic CS4299 datasheet, the CS4299 contains AC'97-compliant control registers and additional Cirrus Logic-defined control registers. These registers configure the codec's core functions and support firmware or software control of audio behavior. The implementation uses CrystalClear delta-sigma and mixed-signal technology, a Cirrus Logic approach intended to support high-precision audio conversion in multimedia equipment.
The CS4299-XQ is relevant to retrofitted desktop computers, industrial legacy systems, embedded AC'97 hosts, audio test equipment, and restoration projects involving older PCI-based sound subsystems. Its AC'97 architecture provides a direct interface to compatible host controllers, while analog input and output stages support connections to microphones, line-level sources, speakers, and external audio amplifiers.
For a new design, confirm that the host controller still supports AC'97 2.1 and verify the complete pin, clock, voltage, and analog specification before layout release. The CS4299 is a legacy codec, and modern systems commonly use USB audio, I2S, or integrated HD audio controllers instead. An existing motherboard is also a critical consideration because the required driver, interrupt, bus, and codec-support capabilities may not exist on current platforms.
This page combines the confirmed codec architecture and AC'97 application information with engineering guidance, comparison fields, and sourcing links for the CS4299-XQ. It also identifies which electrical and package details should be checked against the manufacturer datasheet before production use.
直接替換替代品，適用於 CS4299-XQ — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
CS4299-JQZ
✅ 直接替換📋 參考替代品（不在目錄中）
CS4299-XQ 最大額定值與電氣特性
| Product Type | AC'97 2.1 compatible stereo audio codec |
| Audio Channels | 2 channels |
| Digital Audio Interface | Audio Codec '97 serial interface |
| AC'97 Compatibility | Audio Codec '97 Specification revision 2.1 |
| Conversion Technology | CrystalClear delta-sigma mixed-signal technology |
| Typical Host Connection | PCI bus or integrated system core logic |
| Register Architecture | AC'97-compliant and Cirrus Logic-defined control registers |
| 封裝 | 48-LQFP (7 x 7 mm) |
| 安裝類型 | Surface mount |
CS4299-XQ 48-lqfp (7 x 7 mm) 腳位配置指南
CS4299-XQ（48-lqfp (7 x 7 mm) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： CS4299-XQ.
請參閱 資料表 以查看完整腳位配置。
典型應用
CS4299-XQ 適用於 6 應用s: Legacy Desktop PC Audio, PCI Multimedia Sound Card, Industrial Embedded Audio Controller, Retro Computer Audio Restoration, Audio Test and Measurement Equipment, Legacy Audio Interface Upgrade Box.
Legacy Desktop PC Audio
The CS4299-XQ suits a legacy desktop platform whose system core logic or PCI audio controller supports AC'97 2.1. Place the codec beside the host controller and route its digital interface according to the manufacturer's reference layout, then connect the analog section to the required line-level or amplified output path. The confirmed architecture is purpose-built for PC multimedia systems, but the host must still provide compatible clocking, interrupts, drivers, and bus support. This is a restoration or legacy-maintenance choice rather than a sensible default for a new motherboard, where USB, I2S, or integrated HD Audio would usually offer a more contemporary path.
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PCI Multimedia Sound Card
The CS4299-XQ can serve as the AC'97 audio codec on a legacy PCI multimedia card when the card's controller meets the Intel-compatible bus and control requirements described by the manufacturer datasheet. The codec's digital AC'97 link connects the audio conversion functions to the card controller, while analog line and headphone paths handle external equipment. Layout should follow the manufacturer pin-description and reference-circuit guidance, especially for analog grounding and clock routing. Because AC'97 codecs are obsolete for most new PCI designs, this application is most relevant to industrial replacement, system modernization, or repair of proven hardware that already uses the CS4299.
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Industrial Embedded Audio Controller
An embedded controller platform with a retained AC'97 host interface may use the CS4299-XQ for stereo audio conversion in industrial monitoring, control panels, or communication equipment. Its suitability depends on verifying supply voltage, clock input, operating-temperature range, and digital interface levels from the manufacturer datasheet. For long-lived equipment, the system integrator should also secure continuity of supply and define inspection requirements before committing the part to production. A redesign using I2S may be preferable when the host processor no longer includes AC'97, but preserving the existing AC'97 topology can minimize board changes during maintenance.
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Retro Computer Audio Restoration
The CS4299-XQ is well suited to repairing or replicating a classic AC'97 multimedia sound subsystem where the original system controller, board layout, and software driver already exist. The exact suffix must be matched to the assembly being restored, and the analog network, clock source, and AC'97 bus routing should be compared with the original design. This use is valuable for preserving historical behavior and peripheral compatibility rather than improving specification. Before installation, check socket orientation, pin mapping, supply rails, and signal levels against the board service documentation and the Cirrus Logic datasheet.
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Audio Test and Measurement Equipment
The CS4299-XQ can support a legacy audio test fixture that must emulate an AC'97 host environment and exercise mixed-signal conversion. The fixture must implement the required AC'97 control and data signaling, clocks, resets, and power rails, while careful analog layout helps control noise during measurements. Because the codec was designed around PC multimedia controllers, its value here is compatibility with existing test vectors and legacy equipment rather than access to modern measurement interfaces. Validate the board's power sequencing, grounding, and channel calibration before using it as a reference source in automated audio test systems.
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Legacy Audio Interface Upgrade Box
A compact enclosure can use the CS4299-XQ to preserve an AC'97 audio interface while exposing line-level analog connections to modern test equipment or industrial instrumentation. The host interface remains the difficult part of the design: it must reproduce the AC'97 controller behavior expected by the codec, including required timing and control signaling. Mechanical packaging can follow the confirmed 48-LQFP, 7 x 7 mm surface-mount format, while analog output may require buffering to match the connected load. Treat the CS4299-XQ as a compatibility solution for existing AC'97 ecosystems, not as a general-purpose upgrade for current consumer systems.
推薦
推薦產品摘要
工程參考資料，適用於 CS4299-XQ — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | CS4299-JQZ |
|---|---|---|
| Brand | Cirrus Logic Inc. | Cirrus Logic Inc. |
| Package | 48-LQFP (7 x 7 mm) | 48-LQFP (7 x 7 mm) |
| Device Type | AC'97 2.1 compatible stereo audio codec | AC'97 interface audio codec |
| Digital Interface | AC'97 revision 2.1 compatible | AC'97 |
主要差異化特點
- Native legacy AC'97 host support (對比CS4299-JQZ)
- Purpose-built system-core-logic pairing (對比CS4299-JQZ)
- Confirmed mixed-signal register architecture (對比CS4299-JQZ)
設計說明
Do not treat any modern stereo codec as a direct substitute merely because it performs audio conversion. Confirm that the candidate supports AC'97 revision 2.1 signaling, uses the same 48-LQFP footprint, maps power and clock pins compatibly, and works with the existing host controller and driver. The CS4299-JQZ is the closest identified family option, but suffix-specific electrical and temperature requirements still require verification against the manufacturer documentation.
Use the manufacturer pin-description and reference-layout guidance to separate the digital AC'97 section from sensitive analog audio paths. Keep analog ground, digital return current, clock routing, and the exposed thermal or supply structure within the documented arrangement. A legacy codec revision cannot be treated as a generic LQFP: incorrect pin mapping can prevent host enumeration, introduce channel noise, or cause damage even when the physical socket fits.
Before powering the board, verify the codec's required supply rails and sequencing directly from the manufacturer datasheet. The confirmed AC'97 architecture does not establish the permitted voltage, tolerance, ramp requirement, or relationship between analog and digital supplies. Check the installed board's regulators and test the rails before enabling the host controller. For long-life systems, include a power-sequence fault in the hardware test plan so an incompatible board configuration is identified without stressing the device.
合規資訊
The identified Cirrus Logic product documentation does not expose explicit compliance results in the product pages listed for this MPN. Compliance status must be confirmed for the exact ordering code before qualification.
