W681513

W681513 5V SINGLE-CHANNEL VOICEBAND CODEC FOR USB APPLICATIONS www.DataSheet4U.com Preliminary Data Sheet -1- Publication Release Date: October 1, 2003 Revision A3 W681513 1. 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. The W681513 includes an on-chip precision voltage reference and an additional power amplifier, capable of driving 300Ω loads differentially up to a level of 6.3V peak-to-peak. The analog section is fully differential, reducing noise and improving the power supply rejection ratio. The data transfer protocol supports both long-frame and short-frame synchronous communications for PCM applications, and IDL and GCI communications for ISDN applications. W681513 accepts 2MHz master clock rate, and an on-chip pre-scaler automatically determines the division ratio for the required internal clock. 2. FEATURES Single +5V power supply Typical power dissipation of 30 mW, power-d...