CS8406-DSZ - 192 kHz Digital Audio Interface Transmitter | Cirrus Logic
料号： CS8406-DSZ ✓ 量产中CS8406-DSZ 概述
A digital audio interface transmitter, or DIT, is the bridge between a digital audio source and a physical digital audio link. A source such as a DAC, a digital mixer or an audio codec produces parallel PCM samples and a clock; the DIT multiplexes those samples, adds framing and parity information, and converts the result into a serial differential stream. In the signal-chain hierarchy it sits below the audio codec and DAC, above the physical cable, and therefore at the boundary of the digital audio interface IC family.
Key features include full 192 kHz sample-rate support, hardware control pins that configure the output format and master-clock behavior without host intervention, and a 3-wire serial control interface for register-based configuration. The transmitter accepts serial audio with an ILRCK-derived or external word clock, provides an SDIN data input and an ISCLK system clock input, and can either pass through or generate the master clock through the OMCK output.
Architecturally the CS8406 is a monolithic CMOS device that multiplexes the incoming audio data, applies the digital audio framing and biphase encoding, and drives the TXP and TXN differential outputs through an integrated line driver. Serial audio source, clock, source and control are separated into dedicated pins so that both hardware-strapped and software-configured operating modes are supported, which allows a design to be configured at assembly time and fine-tuned later through the serial control port.
Typical applications include AV and DVD receivers, CD recorders, digital mixing consoles, professional audio equipment, set-top boxes, and any product that must deliver a S/PDIF or AES3 output from a digital audio engine. The dual-rail-capable supply lets the same part fit both 3.3 V and 5.0 V system architectures.
When designing with the CS8406, note that the differential outputs must be AC-coupled to the receiving device and that the output format, master-clock mode and parity setting must be matched to the receiver; a mismatch in framing mode is the most common cause of intermittent audio lock. Use the pin-description and typical-application tables in the manufacturer datasheet when assigning PCB tracks and selecting capacitors.
This page consolidates the manufacturer interface description, drop-in sourcing options, pin-level design notes and application guidance into a single engineering reference for the CS8406-DSZ.
直接替换替代料： CS8406-DSZ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
CS8406-DSZR
✅ 直接替换📋 参考替代料（不在目录中）
CS8404-DSZ
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
CS8406-DSZ 最大额定值与电气特性
| Device Type | Digital Audio Interface Transmitter (DIT) |
| Manufacturer | Cirrus Logic |
| Maximum Sample Rate | 192 kHz |
| Supported Standards | AES3, IEC60958, S/PDIF, EIAJ CP1201 |
| Channel Count | 2 channel |
| 电源电压 | 3.3 V or 5.0 V |
| Process Technology | Monolithic CMOS |
| 封装 | 28-lead SOIC (DSZ) |
| 安装类型 | Surface Mount |
| Control Interface | 3-wire serial (I2C-style) control |
| Audio Control Type | Digital |
| Differential Outputs | TXP and TXN |
| Master Clock Output | OMCK |
| Audio Input Pins | ILRCK, ISCLK, SDIN |
| Hardware Control Pins | HWCK0, HWCK1, SFMT0, SFMT1 |
| Data Source Pins | VD, VL (source clock source and control) |
| Decoupling Guidance | 0.1 uF close to supply pins |
| Datasheet Page Count | 42 pages |
| Production Status | Active production |
CS8406-DSZ 28-lead soic (dsz) 引脚配置指南
CS8406-DSZ（28-lead soic (dsz) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： CS8406-DSZ.
请参阅 数据手册 以查看完整引脚配置。
典型应用
CS8406-DSZ 适用于 6 应用s: AV and DVD Receiver Digital Audio Output, Digital Mixing Console Master Output, CD Recorder and Optical Media Player, Professional Audio Interface and Studio Gear, Set-Top Box and Broadcast Decoder Platform, Multi-Channel Home Theater and Active Speaker System.
AV and DVD Receiver Digital Audio Output
The CS8406-DSZ lets an AV or DVD receiver take digital audio from a decoder or DAC and drive it over a single S/PDIF or AES3 cable to an external amplifier. Its 192 kHz capability covers the full high-resolution range these receivers must pass through, including 44.1 kHz, 48 kHz, 96 kHz and 192 kHz streams, so no sample-rate conversion is needed on the transmit path. Because the device runs from 3.3 V or 5.0 V, it fits both older 5 V and current 3.3 V receiver chassis. The TXP and TXN outputs are AC-coupled in the typical application circuit, and the hardware control pins HWCK0, HWCK1, SFMT0 and SFMT1 let the format and master-clock behavior be fixed at assembly time, which is ideal in a high-volume consumer product where a firmware-driven setup would add cost.
推荐
Digital Mixing Console Master Output
Professional digital mixing consoles use the CS8406-DSZ to serialize a stereo mix bus onto an AES3 or S/PDIF output feeding a recorder, stage box or outboard processor. The 192 kHz maximum sample rate matters in professional environments where 96 kHz and 192 kHz sessions are common and the console must not down-convert on the transmit path. The transmitter accepts serial audio with the clock derived from ILRCK or taken from an external ISCLK, and the OMCK output can source or distribute the master clock so that converters in the same console stay locked. For a console with a 3-wire serial control port on the host processor, the CS8406 configuration registers let framing and parity settings be aligned with the receiving equipment, and the HWCK0 and HWCK1 straps provide a safe default if the link must work before firmware is loaded.
推荐
CD Recorder and Optical Media Player
CD recorders and optical media players are classic S/PDIF transmitter applications, and the CS8406-DSZ provides the compliant digital link from the transport to the recording chain. The device encodes according to AES3, IEC60958, S/PDIF and EIAJ CP1201, which covers both consumer and professional receivers from one transmitter. Audio enters through SDIN with its associated clock on ILRCK, and the part delivers a differential TXP/TXN output that is AC-coupled to the line. Because the master clock output OMCK can be configured as a pass-through or source, the same transmitter can drive a downstream DAC and a digital recorder from a common clock domain, avoiding clock drift between the two. The 3.3 V or 5.0 V supply flexibility allows the transmitter to be added to legacy 5 V transport designs without redesigning the power tree.
推荐
Professional Audio Interface and Studio Gear
Studio and project equipment that must expose a standard digital audio link to external mixers, recorders and patch bays uses the CS8406-DSZ to turn an internal PCM bus into a conforming AES3/S-PDIF stream. The 192 kHz ceiling allows modern high-resolution workflows to be routed without software rate conversion, preserving the session sample rate end to end. The monolithic CMOS implementation keeps the transmitter compact enough for dense single-slot and half-rack formats, and the 28-lead SOIC package is a standard, widely supported assembly footprint. In a studio product the serial control port is typically driven by the same host controller that configures the audio converters, which lets the transmit format, parity and master-clock direction be set alongside the rest of the signal chain rather than being hard-strapped.
推荐
Set-Top Box and Broadcast Decoder Platform
Set-top boxes and broadcast decoders frequently need a digital audio output alongside HDMI or coax links, and the CS8406-DSZ provides a low-cost compliant transmitter for that path. The device accepts the decoded audio stream from the platform audio processor and produces an AES3 or S/PDIF output for a downstream receiver or recorder, with no need for a separate encoding FPGA or MCU. The 3.3 V supply option aligns with the common 3.3 V SoC and memory rails used in these designs, while the 5 V option covers legacy analog-output platforms. The hardware control pins give a deterministic default configuration at power-up, which is valuable in a consumer product where the host bootloader may not always run the full configuration sequence before audio is expected to be valid.
推荐
Multi-Channel Home Theater and Active Speaker System
Home theater controllers and active speaker amplifiers often need to distribute digital audio to several zones, and the CS8406-DSZ can serve as the per-zone transmitter that converts an internal digital mix into a standard digital link for each powered speaker or soundbar. Using the same part for every zone simplifies the bill of materials and the control firmware, since the format and clock settings are configured through the same serial control interface in each instance. The 192 kHz support means lossless high-resolution sources can be distributed to capable endpoints without resampling, while the transmitter adds no measurable delay to the audio path. Care should be taken to AC-couple the TXP and TXN outputs and to observe the differential impedance expectations of the receiving node to avoid reflections on long cable runs.
推荐
推荐产品汇总
工程参考数据： CS8406-DSZ ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | CS8406-DSZR | CS8404-DSZ |
|---|---|---|---|
| Brand | Cirrus Logic | Cirrus Logic | Cirrus Logic |
| Package | SOIC-28 (DSZ) | SOIC-28 - same footprint | SOIC-28 - same footprint |
| Device Type | Digital Audio Interface Transmitter | Digital Audio Interface Transmitter | Digital Audio Interface Transmitter |
关键差异点
- Direct drop-in sourcing in the identical 28-lead SOIC footprint （对比 CS8404-DSZ)
- Full 192 kHz and multi-standard encoding in one transmitter （对比 CS8404-DSZ)
- Dual-rail supply flexibility removes a redesign on legacy platforms （对比 CS8404-DSZ)
设计说明
Place the 0.1 uF decoupling capacitor directly at the CS8406 supply pins, with the shortest possible return path to the ground plane, as shown in the manufacturer typical application circuit. Keep the TXP and TXN differential pair routed as a tightly coupled pair over a continuous reference plane, and place the AC-coupling capacitors close to the output pins so that the exposed stub is minimized. Because the device is a CMOS part with fast edge rates, route the serial control lines away from the differential outputs to avoid coupling into the transmitted audio stream.
The most frequent integration failure is a mismatch between the transmitter framing mode and the receiver expectation. Verify the active SFMT0 and SFMT1 hardware strap levels or the corresponding serial control register settings against the format required by the receiving device before power-up, and confirm the master-clock direction on OMCK so the downstream converters are not fed an unexpected clock. A second common error is assuming the 28-lead TQFP variant is interchangeable with the SOIC version; the land patterns are different and require separate layouts.
Use the HWCK0, HWCK1, SFMT0 and SFMT1 pins to define a safe default transmission format directly in hardware, and only drive the serial control port when runtime reconfiguration is required. This keeps the audio link valid during boot, before the host controller has finished initializing, which matters in consumer receivers where audio may be expected immediately after power-on. Where both paths are used, route the control bus away from the audio inputs ILRCK, ISCLK and SDIN to prevent the host clocking from disturbing the recovered word clock.
合规信息
The device is listed as being in active production in a 28-lead SOIC package. No RoHS, REACH, halogen-free or conflict-minerals declarations for this part were available, so those fields are recorded as unknown rather than assumed.
