USB Audio Controller for VoIP Applications - Winbond W681308

Winbond introduced the W681308, a new integrated USB audio controller targeted to VoIP telephony markets. This new audio controller audio controller provides a one-stop, single-chip solution for a spectrum of  Skype and other PC-based VoIP applications from wired and wireless USB handsets, to USB speaker phones, to PSTN/USB dual mode phones, to USB PSTN gateways and USB Analog Telephone Adapters (ATAs) to the wireless USB 2.4Ghz base / handset.

Winbond W681308 USB Audio Controller IC

Benefits:

• Provide PC VoIP users with easy to use regular phone experience.
• High audio quality codec provide wideband voice quality with AEC/AGC for speaker phone applications
• High integration enable lower cost USB speaker phone solution BOM
• Easily customizable on chip OTP ROM for quick product feature update for mass production.
• Winbond total solution and support enable quick customer design to mass production.

Winbond's W681308 chip is USB2.0 full speed compatible and integrates a fast 8051 MCU that enables feature rich applications. The part also has a 8/16/48-kHz sampling rate wideband Codec with a 16-bit ADC/DAC and Acoustic Echo cancellation (AEC) and Automatic Gain Control (AGC)  to support USB speaker phone applications. This single-chip solution also supports full-duplex echo cancellation, 3-channel PCM mixer, integrated microphone amplifier and speaker driver, flexible OTP custom programming and complete reference design solutions.

Winbond W681308 USB Audio Controller Block Diagram

The W681308 is designed for PC-based VoIP applications targeting USB wired/wireless handset, USB speaker phone, PSTN/USB dual mode phone, USB PSTN gateway and USB Analog Telephone Adapters (ATAs).

Ike Saeed, Winbond Electronics Corporation America:

Winbond's market commitment is to provide a complete line of USB Audio and PC-based VoIP solutions. With this new product for USB VoIP applications, we are enabling customers to easily and quickly build a full line of USB VoIP products for Skype

The W681308 includes an integrated 3-channel PCM mixer for conference applications, an SPI interface for external serial flash and LCD module support. For building USB Gateway and USB ATA solutions, developer can combine the W681308 with Winbond’s Voice CODEC or Pro-X ICs.

Skype, which has revitalized the VoIP market, experienced a significant growth since 2006 and with Skype's nationwide calling program at an annual $29.95 cost, industry forecasts call for an exponential growth as compared to other VoIP telephony options. Winbond, a leading supplier of semiconductor solutions to the consumer, computer, communications and electronics products markets, continues its commitment to the VoIP market and specifically Skype phones and PC peripheral applications with these new products.

This device joins the Winbond USB Audio Controller Series (W681306, W681307 and W681308) which provides a complete line of USB VoIP and audio solutions including Skype with integrated, fast MCUs, USB2.0 Full Speed compliant controller, 16-bit ADC/DAC with 8-kHz to 48-kHz sampling rate. They support Skype or SIP USB VoIP application and other (Instant Messaging (IM) options such as MSN and Yahoo Messenger. This Series is designed to provide the highest voice quality in a VoIP environment and delivers USB VoIP solutions for customers with the shortest time-to-market requirements.

Application of W681308 USB Audio Controller:

• USB VoIP device for IP Set Top Box
• Wired/wireless USB handset
• USB conference speaker phone
• Dual mode phone
• USB audio recording / playback device
• USB ATA/gateway

The following pictures show two application example of W681308 USB Audio Controller:

• USB Speaker phone handset
• USB Wireless base-station with speaker

Application Example of W681308 USB Audio Controller

Features summary of of W681308 USB Audio Controller:

• 8 Bit Turbo MCU
  • Embedded 12/24/48MHz Turbo 8051 MCU with 4 Clocks per Machine Cycle
  • 1KB system RAM, 8KB OTP ROM with read protection mode.
  • In Circuit Emulation (ICE) through JTAG Interface
• High Quality 16 bit Audio Linear CODEC
  • Built-in 8K/16K/48KHz sampling rate wide-band Audio CODEC and true 16 bits resolution ADC/DAC with internal 24 bit audio data processing for both record and playback
  • On-chip Microphone amplifier and speaker driver with programmable gain stage.
• USB 2.0 FUll speed Interface and HID support
  • 512 Bytes RAM-base Descriptor to customize HID command support through 8051
  • Support 5 end points configuration: Control Out, ISO IN/OUT, Bulk IN, Bulk OUT and Interrupt IN.
• Integrated echo cancellation
  • Support both half-duplex AEC and 32ms full duplex AEC
  • Build-in digital AGC for speaker phone application.
• Integrated keypad control pins and GPIOs
  • Volume up and down
  • Microphone and speaker phone mute.
  • Dial / hang up
  • LED indicators
  • LCD Module interface control
  • User programmable keys
  • Number pad control
  • Keypad scanning
• PCM Interface
  • 3 channels PCM mixer
  • Master Linear PCM interface to connect Winbond ProX CODEC/SLIC for ATA or PSTN gateway applications
• SPI interface
  • Works in master modes to control LCD/LCM or other SPI slave devices
  • SPI serial Flash interface and W2S 2 Wire interface.
• UART
  • UART port for serial data application and debugging
• 5V USB voltage supply
  • 3.3V linear regulator using external transistors.
• Package
  • 48 pin LQFP package 7mmx7mmx1mm

A complete Software Development Kit (SDK) and 8051-based Keil C development system for these parts is available.

Windbond W681308 W681308 USB Audio Controller pricing is being quoted as $1.80 (at 10k qty).

More info: Winbond W681308 USB Audio Controller for VoIP Applications