The W681308 USB audio controller targets all application segments of Skype or other PC-based VoIP systems. USB 2.0 full-speed compatible, the chip integrates a fast 8051 MCU, an 8/16/48-kHz sampling rate wideband codec, 16-bit A/D and D/A converters, acoustic echo cancellation, and AGC to support USB speaker phone applications.

The 48-pin LQFP-packaged chip provides full-duplex echo cancellation, a 3-channel PCM mixer, a microphone amplifier, a speaker driver, and flexible OTP custom programming and complete reference designs.