W681308DG - USB Audio Controller 16-bit 48-LQFP | Nuvoton
N.º de pieza: W681308DG ✓ Activo| Cant. | Precio unitario | Total |
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| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1.000 | $0 | $0,00 |
W681308DG Descripción general
A USB audio controller is a mixed-signal device that implements the USB audio class protocol on the digital side and an audio codec (codec = coder-decoder) on the analog side. Within the system hierarchy, it sits between a general-purpose USB microcontroller and a dedicated audio codec: it handles USB enumeration, audio streaming, clocking, and sample-rate conversion, while also providing microphone and speaker signal paths. This integration reduces bill-of-materials count compared to a discrete USB MCU plus external codec solution.
Key features of the W681308DG include a 16-bit audio data path, USB full-speed audio transport, integrated microphone and speaker audio channels, and a compact 7x7 mm 48-LQFP footprint that supports consumer peripheral form factors. The device operates from a 3.3 V supply, consistent with the family datasheet description of the W681308 series as a 3.3 V part.
Architecturally, the W681308 combines an 8-bit CISC microcontroller core with on-chip program memory and a hardwired USB audio function block. The codec front end handles anti-aliasing filtering, ADC for microphone inputs, and DAC for speaker outputs, while the MCU firmware manages HID interfaces, mute/volume controls, and other USB descriptor behavior. Refer to the manufacturer datasheet for precise clock, PLL, and interface specifications.
Typical applications include USB headset and headphone amplifiers, desktop microphone arrays, USB speakerphones, VoIP handsets, and general USB audio dongles where a single-chip, low-cost USB audio solution is required.
A key design consideration is analog layout: the microphone preamp and DAC outputs are sensitive to digital return-path noise, so a solid ground plane, careful separation of analog and digital traces, and proper decoupling of the 3.3 V rail per the manufacturer datasheet recommendations are essential for a low-noise result.
This page synthesizes distributor sourcing data, datasheet references, and practical design notes not found in the manufacturer datasheet.
Alternativas directas para W681308DG — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
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Solicitar alternativasW681308DG Valores máximos y características eléctricas
| Product Type | USB Audio Controller (Codec) |
| Audio Resolution | 16 bit |
| Core | 8-bit CISC microcontroller |
| Interfaz | USB Audio |
| Tensión de alimentación | 3.3 V |
| Encapsulado | 48-LQFP (7x7 mm) |
| Tipo de montaje | Surface Mount |
| Analog Inputs | Microphone input channels |
| Analog Outputs | Speaker/headphone output channels |
| Category (DigiKey) | CODECS / Audio Interface |
| Packaging | Tray |
Guía de configuración de pines de W681308DG 48-lqfp (7x7 mm)
Configuración de pines para W681308DG (encapsulado 48-lqfp (7x7 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 W681308DG.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
W681308DG es adecuado para 6 aplicacións: USB Headsets and Headphone Adapters, USB Desktop Microphones, VoIP Handsets and Speakerphones, USB Audio Dongles and Sound Cards, Legacy Audio Peripheral Repair and Sustaining, Computer Peripherals with Audio plus HID.
USB Headsets and Headphone Adapters
The W681308DG fits USB headset designs because it integrates the full signal chain a headset dongle needs: a full-speed USB audio interface, a 16-bit codec, microphone input amplification, and speaker/headphone output drivers, all powered from a single 3.3 V rail in a compact 7x7 mm 48-LQFP. In a typical headset adapter, the USB bus supplies 5 V VBUS, which is locally regulated to 3.3 V for the controller; the chip enumerates as a standard USB audio class device so it works without vendor drivers on mainstream operating systems. The performance consideration is noise: 16-bit conversion requires clean analog rails and careful grounding, so headphone output SNR depends heavily on layout quality. Compared with a discrete MCU plus codec solution, the single-chip W681308DG reduces BOM count and board area in price-sensitive headset products.
Recomendado
USB Desktop Microphones
For USB desktop microphones, the W681308DG serves as the entire digital front end: the integrated microphone input path accepts electret or MEMS capsule signals with bias, applies 16-bit analog-to-digital conversion, and streams the audio over USB while the embedded 8-bit CISC MCU manages enumeration, mute buttons, and LED indicators. A 3.3 V supply from the USB bus keeps the design bus-powered with no external power supply. The engineering consideration is that microphone preamp noise sets the product's effective dynamic range, so the datasheet-recommended bias network and decoupling must be followed, and the analog ground region should be kept free of digital return currents from the USB interface. Compared with a general-purpose MCU plus external codec, the single-chip W681308DG shortens development time for consumer microphone products.
Recomendado
VoIP Handsets and Speakerphones
VoIP handsets and USB speakerphones benefit from the W681308DG's combination of USB audio transport and integrated speaker output channels. The device streams 16-bit bidirectional audio over USB, so both the receive (speaker) and transmit (microphone) paths of a speakerphone are handled by one chip, while the embedded MCU firmware handles hook-switch, volume, and mute controls as USB HID functions. Operation from 3.3 V simplifies integration into handset housings powered by the USB port of a PC or desk phone base. The key trade-off is output power: the codec's speaker output is intended for small transducers, so louder speakerphone products add an external class-D amplifier after the DAC output. Verify speaker drive levels and click-and-pop behavior in the 64-page W681308 datasheet before finalizing the audio output design.
Recomendado
USB Audio Dongles and Sound Cards
Compact USB audio dongles and entry-level external sound cards are a natural fit for the W681308DG because the 48-LQFP 7x7 mm package and single-chip integration keep the entire audio electronics small enough for thumb-drive-format enclosures. The chip enumerates as a USB audio class device at full speed, delivering 16-bit playback and record without drivers, while the embedded MCU handles volume, mute, and playback-device selection through HID buttons. The design consideration for dongles is that USB bus power must be shared between the 3.3 V logic and any headphone amplifier stage, so power budgeting and a low-dropout regulator with adequate current rating are required. Legacy dongle designs built around the W6813 series also sustain well with this part, given proven firmware and PCB footprints.
Recomendado
Legacy Audio Peripheral Repair and Sustaining
One of the strongest use cases for the W681308DG is sustaining and repairing existing Winbond/Nuvoton-based audio hardware: older USB headsets, conference phones, and telephony products whose firmware and PCB were designed around the W6813 series. Because no verified pin-compatible cross-brand substitute exists as of 2026-10-11, maintaining a stock of the original W681308DG in its 48-LQFP package is the lowest-risk approach for field repairs and production continuity. The engineering consideration is obsolescence risk: the part is an older product family, so buyers should confirm long-term availability with distributors and consider last-time-buy quantities if production forecasts extend beyond confirmed stock. Octopart tracks 14 distributor sources, which helps in multi-sourcing strategies for sustaining programs.
Recomendado
Computer Peripherals with Audio plus HID
Products that combine audio with human-interface controls - such as conference speaker bases with mute buttons and LED rings, gaming chat headsets with volume wheels, or telephony devices with hook switches - exploit the W681308DG's embedded 8-bit CISC MCU alongside its 16-bit codec. The MCU firmware maps physical buttons and indicators to standard USB HID reports, so a single chip delivers both the audio class and HID class interfaces over the USB cable, eliminating a separate microcontroller. Powered from 3.3 V derived from USB bus power, the design stays simple and bus-powered. The performance consideration is firmware timing: audio streaming isochronous bandwidth must be scheduled around HID polling, which the W6813-series architecture handles in hardware. Consult the 64-page datasheet for HID endpoint configuration details.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para W681308DG — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto |
|---|---|
| Package | 48-LQFP (7x7 mm) |
| Brand | Nuvoton |
| Audio Resolution | 16 bit |
| Core | 8-bit CISC MCU |
| Supply Voltage | 3.3 V |
| Interface | USB Audio (full speed) |
| Analog Channels | Mic in + Speaker out |
| Application Domain | USB audio peripherals |
Diferenciadores clave
- Single-chip USB audio integration (frente a Discrete USB MCU + external codec)
- Compact 7x7 mm footprint (frente a Larger legacy DIP/TQFP audio controllers)
- Legacy design continuity with no drop-in substitute (frente a Modern USB codecs (e.g., TI TLV320 series))
Notas de diseño
The W681308DG operates from a 3.3 V supply. In USB bus-powered designs, VBUS is 5 V, so a local 3.3 V LDO or buck regulator is required; estimated total analog plus digital load should be budgeted per the 64-page W681308 datasheet supply-current tables. Decouple each supply pin with 100 nF ceramic capacitors placed within a few millimeters of the pin, plus a bulk 10 uF capacitor near the regulator output. Verify inrush and suspend-mode current against USB bus-power limits (500 mA maximum per port for full-speed devices) before release.
Route the USB D+/D- pair as a tightly coupled 90-ohm differential pair with matched trace lengths, kept away from the codec's analog audio traces and crystal circuit. Because the W681308DG integrates both digital USB logic and a 16-bit analog codec on one die, return-current management matters: do not split the ground plane under the chip; instead, partition by component placement so analog microphone and speaker traces stay on the analog side of the layout. Follow the typical application circuit in the Nuvoton W681308 datasheet for biasing networks.
The most common pitfall with the W681308DG is treating it as a generic MCU and ignoring codec-specific requirements: microphone bias filtering, output coupling capacitors, and click-and-pop suppression during power-up must follow the datasheet recommended circuit, or audible pops and noise will appear in production units. A second pitfall is sourcing: no verified pin-compatible drop-in replacement exists (verified as of 2026-10-11), so designs should either secure adequate stock or plan a board-level migration to a modern USB audio codec. Confirm the exact part-number suffix before placing orders, since W6813-series suffixes differ in package and features.
Información de cumplimiento
Compliance data was not present in the verified web data for this part. Confirm RoHS/REACH status with Nuvoton or the distributor before order placement.
