W681308DG

Overview

The W681308 is a USB Audio Controller integrating an 8-bit Turbo 8051 MCU, USB 2.0 Full Speed interface with PHY, and a 16-bit mono audio CODEC. It features 8 KB OTP program memory and 1 KB data memory within a 48-pin LQFP package. The device supports 8/16/48 KHz sampling rates with true 16-bit resolution ADC/DAC and internal 24-bit audio processing. Key specifications include an 82 dB Receive SNR at an 8 Ohm load, integrated acoustic echo cancellation (AEC), and programmable gain stages for microphone amplification and speaker driving.

Feature Summary

• Integrates a Turbo 8051 MCU with JTAG In-Circuit Emulation support
• Includes a high-quality 16-bit mono audio CODEC with wideband sampling capabilities
• Supports both half-duplex and full-duplex acoustic echo cancellation
• Features built-in linear regulator and cap-less microphone amplifier

Applications

• USB audio peripheral boxes and sound cards
• USB microphones and mono headsets
• Wired and wireless USB VoIP phones with LCD displays
• USB VoIP ATA and Gateway devices
• PSTN and USB VoIP dual phones

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct package type and temperature rating. Confirm current production status as components may be subject to discontinuation or lifecycle changes. Cross-reference the datasheet revision number to validate all electrical characteristics and pin configurations before finalizing procurement orders.

Selection Notes

Select this component for designs requiring a highly integrated USB audio solution with onboard processing. Ensure the application utilizes the 48-pin LQFP footprint dimensions of 7mm x 7mm x 1mm. Verify that the system power budget accommodates the specified operating conditions and that the required USB endpoints align with the six available configuration options.

Part Context

This controller belongs to Nuvoton's specialized USB audio family, designed to reduce bill-of-materials costs by combining MCU, codec, and USB PHY functions. It targets developers seeking rapid deployment for VoIP and multimedia peripherals using a standard 8051 development platform.

Replacement Considerations

Consult the manufacturer's official cross-reference list for verified substitute part numbers. Do not assume functional compatibility with other series without validating register maps and pinouts.