CS8420-CSZ Stereo Audio Sample-Rate Converter | Cirrus Logic
N.º de pieza: CS8420-CSZ ✓ ActivoCS8420-CSZ Descripción general
A digital audio sample-rate converter is a specialized interface IC that receives digital audio data at one sampling rate and reconstructs a corresponding output stream at another sampling rate. This capability sits between digital audio interfaces and the broader signal-chain hierarchy of digital audio processing, interface conversion, and semiconductor signal conditioning. Unlike a linear voltage regulator, the CS8420 does not regulate power; it processes and reconstructs digital audio data using clocking, filtering, and serialization circuitry.
The CS8420 supports AES3-type and serial digital audio inputs together with AES3-type and serial digital audio outputs. Its serial digital audio ports use a three-wire interface, while configuration is handled through a four-wire microcontroller port. These functions make the device applicable in professional audio equipment, digital mixers, consumer audio systems, and other products requiring asynchronous sample-rate conversion. Familiarity with the AES3 and IEC60958 specifications is assumed for system-level design.
The CS8420-CSZ is identified as a consumer-circuit device and is offered in a 28-pin SOIC with a 0.300 inch lead pitch. Its rectangular gull-wing surface-mount package supports conventional PCB assembly and routing. The manufacturer documentation describes the main functional blocks and supply connections, providing the basis for evaluating clock sources, digital-audio routing, control firmware, and power-supply implementation before schematic capture.
Typical uses include conversion between asynchronous digital-audio domains, S/PDIF-compatible equipment, digital mixers, and multi-format audio interfaces. In these systems, the converter can bridge incoming AES3 or serial audio with an output domain operating at a different sampling rate. The microcontroller interface allows the host processor to select operating modes and monitor converter behavior, although the complete control register set must be implemented from the manufacturer datasheet.
When laying out a CS8420-CSZ board, treat the digital-audio traces as potentially high-speed signals and follow the connection and layout guidance in the manufacturer datasheet. Keep the supply and external connections close to their intended circuit roles, provide the required bypassing, route clocks away from sensitive audio paths, and confirm that connector, transformer, and receiver choices support the selected AES3 or IEC60958 interface.
This page organizes the available CS8420-CSZ technical information with package details, verified drop-in alternatives, comparison criteria, and practical design guidance. It is intended to help engineers identify interface requirements, plan PCB implementation, and source an exact MPN without overlooking the distinction between digital audio conversion, clocking, and general-purpose signal processing.
Alternativas directas para CS8420-CSZ — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
CS8420-CZZ
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
CS8420-CSZR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
CS8420-CS
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
CS8420-CSZ Valores máximos y características eléctricas
| Device Type | Stereo digital audio sample-rate converter |
| Channel Count | 2 channels |
| Digital Audio Inputs | AES3-type and serial digital audio |
| Digital Audio Outputs | AES3-type and serial digital audio |
| Serial Audio Port Interface | 3-wire serial digital audio |
| Control Interface | 4-wire microcontroller port |
| Supply Voltage Range | 4.75 V to 5.25 V |
| Encapsulado | 28-pin SOIC |
| Lead Pitch | 0.300 inch |
| Terminal Form | Gull wing |
| Package Shape | Rectangular |
| Estilo de montaje | Surface mount |
| Temperature Grade | Commercial |
| Supported Digital Audio Standards | AES3, IEC60958, EIAJ CP1201, and S/PDIF-compatible interfaces |
Guía de configuración de pines de CS8420-CSZ rectangular
Configuración de pines para CS8420-CSZ (encapsulado rectangular). Este CI digital incluye GPIO, interfaces de comunicación (UART, SPI, I2C) y pines de alimentación. Consulte la hoja de datos del fabricante para conocer las funciones alternativas de los pines y las opciones de configuración. Esencial para el diseño de sistemas embebidos y el diseño de PCB.
No hay datos detallados de patillaje disponibles para CS8420-CSZ.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
CS8420-CSZ es adecuado para 6 aplicacións: Asynchronous Digital Audio Conversion, AES3 and IEC60958 Audio Equipment, Digital Mixer Signal Routing, Consumer Digital Audio Interface, Digital Audio Format Bridge, Studio Monitor and Recording Interface.
Asynchronous Digital Audio Conversion
The CS8420-CSZ is appropriate when a stereo digital-audio system must accept one clock domain and produce a stream for another. Its two-channel sample-rate conversion capability is combined with AES3-type and serial digital audio inputs and outputs, allowing source and destination formats to be connected without treating the device as a general-purpose codec. The four-wire microcontroller interface gives the host processor a path to configure the converter, while the three-wire serial audio connections simplify connections to compatible transmitters and receivers. Design the clocking and source selection around the manufacturer application diagram, and verify the required sample-rate ranges during component qualification.
Recomendado
AES3 and IEC60958 Audio Equipment
The CS8420-CSZ fits professional or consumer interfaces that need AES3-type digital audio alongside serial audio conversion. The Cirrus Logic documentation identifies compatibility with AES3, IEC60958, EIAJ CP1201, and S/PDIF-oriented interfaces, while the IC exposes both AES3-type and serial paths. This allows a system to normalize digital audio before routing it to another clock domain. The implementation still depends on correct source impedance, termination, clocking, connector protection, and output configuration, all of which should be taken from the manufacturer connection diagram rather than inferred.
Recomendado
Digital Mixer Signal Routing
A digital mixer can use the CS8420-CSZ when internal processing operates at a different sampling rate from an incoming or outgoing stereo stream. The two-channel converter supports AES3-type and serial inputs and outputs, allowing digital audio to enter, change sampling domain, and leave through compatible paths. Host-controlled operating modes are accessed through the four-wire microcontroller port, so firmware can be integrated with the mixer control architecture. Use the manufacturer's external-connection drawing to establish clock sources and signal routing, and validate the complete audio path with the system-level sample rates and format requirements.
Recomendado
Consumer Digital Audio Interface
The CS8420-CSZ is suited to consumer audio products that need to reconcile digital audio streams while retaining support for established AES3 and serial formats. Its 4.75 V to 5.25 V operating range allows integration with a conventional 5 V audio subsystem, while the 28-pin SOIC package supports surface-mount PCB construction. The converter can sit between an input receiver, digital processing section, and output transmitter, provided each stage supports the selected sampling rate and clock arrangement. Confirm pin-level power distribution and grounding against the manufacturer circuit before release.
Recomendado
Digital Audio Format Bridge
The CS8420-CSZ can bridge a system that mixes AES3-type and serial digital audio interfaces by providing both input types and both output types on one converter. This is useful when an input module uses one physical digital-audio format and a downstream converter or transmitter expects another. Because the device also performs asynchronous sample-rate conversion, the bridge is useful when the two sides do not share a common sample rate. The four-wire microcontroller port supports configuration, but system timing, master-clock behavior, and supported rates must be established from the manufacturer datasheet before selecting board components.
Recomendado
Studio Monitor and Recording Interface
Recording interfaces and studio monitors often combine external digital-audio connections with an internal processing clock domain. The CS8420-CSZ supports the required class of interface through AES3-type and serial digital audio inputs and outputs, two-channel conversion, and microcontroller control. A designer can place it after an AES3 receiver or before an output driver to convert the stereo stream before processing. The 4.75 V to 5.25 V supply range fits a 5 V-based design, but low-noise local bypassing and careful clock routing remain essential to preserve recording-system performance.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para CS8420-CSZ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | CS8420-CZZ | CS8420-CSZR | CS8420-CS |
|---|---|---|---|---|
| Package | 28-pin SOIC | 28-pin SOIC | 28-pin SOIC | 28-pin SOIC |
| Brand | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic |
| Device Type | Stereo digital audio sample-rate converter | Digital audio sample-rate converter | Digital audio sample-rate converter | Digital audio sample-rate converter |
| Pin Compatibility | 28-pin SOIC reference design | Direct pin-compatible | Same silicon die and specifications | Same 28-pin package family; verify pinout |
Diferenciadores clave
- Directly documented pin-compatible ordering option (frente a CS8420-CZZ)
- Same-die option for automated assembly (frente a CS8420-CSZR)
- Clearly identifiable published noise comparison (frente a CS8420-CS)
Notas de diseño
Build the PCB from the supply and external-connection figure in the Cirrus Logic CS8420 datasheet. Keep digital-audio inputs, outputs, clock connections, and control lines routed according to the manufacturer's recommended topology. Pay particular attention to return paths and keep the four-wire microcontroller interface away from sensitive analog sections of the host board.
Treat AES3, serial digital-audio, and clock nets as high-speed digital signals. Match trace lengths where the interface implementation requires it, use continuous reference planes, minimize stubs, and place termination or protection components at the appropriate interfaces. Use the manufacturer's clock and external-connection guidance to determine which signals require source-synchronous routing or controlled impedance.
The CS8420-CSZ operates from 4.75 V to 5.25 V. Provide local supply bypassing close to the device using the capacitance and layout values specified in the manufacturer datasheet, and route the return current through a low-impedance ground path. Do not derive component values from generic audio-layout rules when the manufacturer provides a specific supply circuit.
Do not approve an alternative solely because it belongs to the CS8420 family or uses a 28-pin SOIC. CS8420-CZZ is described as directly pin-compatible, and CS8420-CSZR shares the die, but ordering suffixes, supply format, noise characteristics, control behavior, and lifecycle conditions still belong in the engineering review. Record the selected manufacturer ordering code on the BOM and schematic.
Información de cumplimiento
The CS8420-CSZ is identified as a commercial-temperature consumer circuit. RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations must be confirmed from the manufacturer or current product documentation.
