GENERAL DESCRIPTION
The W681513 is a single channel PCM CODEC with pin-selectable µ-Law or A-Law companding dedicated to the USB accessory market by supporting a derivative 2MHz clock. The device is compliant with the ITU G.712 specification. It operates off of a single +5V power supply and is available in 20-pin SOP package option. Functions performed include digitization and reconstruction of voice signals, and band limiting and smoothing filters required for PCM systems. The filters are compliant with ITU G.712 specification. W681513 performance is specified over the industrial temperature range of –40°C to +85°C.

FEATURES
• Single +5V power supply
• Typical power dissipation of 30 mW, power-down mode of 0.5 µW
• Fully-differential analog circuit design
• On-chip precision reference of 1.575 V for a 0 dBm TLP at 600 Ω
• Push-pull power amplifiers with external gain adjustment with 300 Ω load capability
• Master clock rate supports 2.000MHz clock for USB applications
• Pin-selectable µ-Law and A-Law companding (compliant with ITU G.711)
• CODEC A/D and D/A filtering compliant with ITU G.712
• Industrial temperature range (–40°C to +85°C)
• Package: 20-pin SOP (SOG)

APPLICATIONs
• Soft phones running on a PC (VoInternet):
    o USB Phones
    o USB to PSTN Gateway
• USB Microphones
• USB Headset for PC and Game Consules