CS4280-CQ PCI Audio Interface | Cirrus Logic | 128-TQFP
N.º de pieza: CS4280-CQ ✗ Fin de vidaCS4280-CQ Descripción general
An audio interface IC is a semiconductor that connects a computer or multimedia bus to an external audio subsystem. The CS4280-CQ occupies the audio-controller level of the signal chain, where digital audio and control information pass between the host system and supporting codec, converter, or amplifier circuitry. This broader category includes PCI audio controllers, audio codecs, digital volume controllers, and mixed-signal interface ICs used in computers, sound cards, and other multimedia equipment.
The CS4280-CQ uses a 128-TQFP package and a nominal 3.3 V connection for the crystal and PLL supply identified in the device documentation. Its suffix corresponds to a ceramic-body quad flat package offered in a 20 x 14 mm outline. The available verified records also identify a serial control connection and a one-channel digital volume-control role, although detailed electrical limits, supported sample rates, clocking modes, and host-interface timing are not included in the supplied source data.
The CS4280-CQ belongs to the CrystalClear generation of PCI audio solutions from the late 1990s. Historical documentation states that it is pin-compatible with the earlier CS4614 and CS4622/CS4624 devices and is commonly paired with the CS4297 audio codec. This makes it a notable component in period-correct PCI audio-card repair, restoration, cloning, and industrial or retro-computing projects where an original footprint can reduce board-level rework.
Typical implementations include PCI sound cards, industrial personal-computer audio subsystems, multimedia appliances, and retrofit projects that require the original CrystalClear signal chain. The verified search results specifically identify the CS4280 in the JoyTech Twister 3D sound card and Pine Technology PT2620. A restoration design must also account for obsolete system drivers and operating-system support, because silicon compatibility alone does not guarantee software compatibility.
For a replacement or repair, verify the PCB land pattern, supply rails, signal names, clock source, codec interface, and firmware expectations before ordering. Do not assume that a similarly described volume-control IC is electrically interchangeable. The verified data establishes CS4281-CQ as a cross-reference alternative, but the supplied records do not provide enough pin-level and parametric information to certify an unconditional drop-in replacement.
This product record combines verified package, lifecycle, pricing, and legacy-compatibility information with explicitly identified data gaps. It distinguishes the CS4280-CQ from modern audio codecs, identifies the strongest documented alternatives, and highlights the host-driver and PCB-verification constraints that are essential when restoring a legacy PCI audio design.
Alternativas directas para CS4280-CQ — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
CS4281-CQ
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
CS4280-CQ Valores máximos y características eléctricas
| Product Type | CrystalClear PCI audio interface |
| Audio Function | Single-channel digital volume control |
| Encapsulado | 128-TQFP (20 x 14 mm) |
| Recuento de pines | 128 pins |
| Package Length | 20 mm |
| Package Width | 14 mm |
| Tipo de montaje | Surface mount |
| Crystal and PLL Supply | Nominal 3.3 V |
| Control Interface | Serial control interface |
| Documented Companion | CS4297 audio codec |
| Documented Pin Compatibility | Compatible with CS4614 and CS4622/CS4624 |
| Known Host Platform | PCI |
| Introduction Date | May 26, 1998 |
| Estado del ciclo de vida | Obsolete / end of life |
Guía de configuración de pines de CS4280-CQ 14 mm
Configuración de pines para CS4280-CQ (encapsulado 14 mm). 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 CS4280-CQ.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
CS4280-CQ es adecuado para 6 aplicacións: Legacy PCI Sound Card Restoration, Industrial Personal Computer Audio Upgrade, Retro Computing Audio Board Repair, PCI Multimedia Appliance, Period-Correct Sound Card Reproduction, Educational Audio Interface Demonstration.
Legacy PCI Sound Card Restoration
The CS4280-CQ is suitable for restoring a period-correct PCI sound card when its original audio interface must be retained. The verified documentation identifies the device as a CrystalClear PCI audio interface in a 128-TQFP package, and historical records place it in designs such as the JoyTech Twister 3D sound card. Its original value lies in preserving the intended bus, clock, codec, and analog-signal arrangement rather than introducing a modern redesign. Before installation, compare every relevant PCB net with the datasheet and verify that the associated driver and operating-system environment are available. As with any obsolete controller, continuity, date-code traceability, and solderability require inspection.
Recomendado
Industrial Personal Computer Audio Upgrade
The CS4280-CQ can be considered for an industrial personal-computer or embedded multimedia platform that retains a CrystalClear PCI audio architecture. Its one-channel digital volume-control function and serial control interface make it relevant to systems whose existing board already routes host audio commands through this controller. The 128-TQFP, 20 x 14 mm package preserves the original board footprint when no redraw is permitted. Because the available records do not state operating temperature, power consumption, or supported sample rates, an industrial deployment must confirm those limits directly from the manufacturer document. Software-driver availability and long-term lifecycle support are equally important constraints for this obsolete component.
Recomendado
Retro Computing Audio Board Repair
The CS4280-CQ is a practical repair candidate for retro-computing projects involving original CrystalClear PCI audio hardware. Verified historical documentation states that the controller is pin-compatible with the earlier CS4614 and CS4622/CS4624 families and is commonly coupled with the CS4297 codec. This compatibility history can help technicians identify the function and connected devices when original schematics or board documentation are incomplete. However, the relationship to earlier codecs does not make every related part a drop-in substitute. Inspect the installed device, trace its PCI and codec nets, and confirm package geometry before ordering. Software support must also be matched to the target host operating system.
Recomendado
PCI Multimedia Appliance
The CS4280-CQ can support a legacy PCI multimedia appliance in which a host controller manages digital audio volume and communicates with a separate audio codec. The verified one-channel digital volume-control description and serial control interface fit a system where the CS4280 handles host-side audio control rather than performing the complete analog conversion chain. The 128-TQFP package provides a known land pattern for an existing board, while the documented CS4297 association helps reconstruct a complete signal path. Before using it in a new appliance, obtain the complete electrical and timing data and verify operating-system drivers. Since lifecycle status is obsolete, availability from specialist stock channels must be planned without assuming manufacturing continuity.
Recomendado
Period-Correct Sound Card Reproduction
The CS4280-CQ is appropriate for recreating a period-correct sound card where preserving the original CrystalClear topology is a design goal. The verified historical information specifically connects the controller with the JoyTech Twister 3D and Pine Technology PT2620, giving technicians identifiable reference designs when checking board layout and signal relationships. Reproduction should use the documented package and companion codec arrangement rather than an unverified modern substitute. Verify pin assignments, clock-source requirements, crystal and PLL supply connections, and the serial control path against the datasheet. Because driver and operating-system support are external to the IC, a successful electrical reconstruction does not by itself guarantee a functional modern system.
Recomendado
Educational Audio Interface Demonstration
The CS4280-CQ can serve as an educational example of a late-1990s PCI multimedia architecture in a hardware laboratory, museum, or archive preservation setting. Its documented 128-TQFP package, digital volume-control role, serial control connection, and association with the CS4297 codec allow learners to study host-to-controller-to-codec signal flow using an authentic component. The board can also support discussion of obsolete-part sourcing, pin-level reconstruction, and legacy-driver behavior. Use an ESD-controlled workspace and inspect the large fine-pitch package carefully. Any public demonstration should avoid implying that the current price or stock position guarantees continued availability, because the device is listed as obsolete and supported by only specialist inventory channels.
Recomendado
Datos de referencia de ingeniería para CS4280-CQ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | CS4281-CQ |
|---|---|---|
| Product Type | CrystalClear PCI audio interface and digital volume-control IC | Alternative part within the Cirrus Logic CS42xx family |
| Brand | Cirrus Logic, Inc. | Cirrus Logic, Inc. |
| Package | 128-TQFP (20 x 14 mm) | 128-TQFP (20 x 14 mm) |
Diferenciadores clave
- Direct documented association with the CS4297 audio codec (frente a CS4281-CQ)
- Historical pin compatibility with earlier CrystalClear controllers (frente a CS4281-CQ)
- Established use in identifiable PCI sound-card designs (frente a CS4281-CQ)
Notas de diseño
Do not treat a family resemblance as proof of drop-in equivalence. The verified cross-reference names CS4281-CQ as an alternative, but the supplied material does not expose its complete pin map or electrical limits. Compare package drawings, PCI signals, codec connections, clock inputs, control registers, supply rails, and reset behavior before substitution. Also verify the host driver: an electrically workable replacement will not be useful if software initialization differs.
Preserve the original 128-TQFP land pattern and inspect the PCB for corrosion, cracked pads, and prior rework before applying power. Confirm the 20 x 14 mm package geometry and pin-one orientation rather than relying only on the device outline. Because the CS4280-CQ is an obsolete fine-pitch part, use controlled soldering and adequate inspection magnification, and compare every replacement pin against the manufacturer pin table before power-up.
Separate the crystal and PLL supply requirement documented for the CS4280-CQ from the device's complete supply architecture. The verified excerpt specifies a nominal 3.3 V crystal and PLL supply, but does not provide the full input-voltage range or current limits. Before energizing a restored board, trace all supply pins against the complete datasheet and verify regulator tolerances, sequencing, ground references, and bypass-capacitor placement using the original reference design when available.
For a period-correct board repair, retain the original signal and decoupling topology instead of improvising a modern layout. Keep clock traces short, maintain the documented ground and analog-supply arrangement, and avoid adding long test leads near sensitive audio nets. The CS4280 is commonly paired with the CS4297 codec, so trace that interface end to end and compare pin names, logic levels, and direction on both devices before exchanging either component.
Información de cumplimiento
The supplied verified records do not state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification status. AEC-Q100 is marked not_applicable because the product is documented as a legacy PCI audio interface rather than an automotive device.
