W681512 SINGLE-CHANNEL VOICEBAND CODEC Data Sheet Revision C17 W681512 1. GENERAL DESCRIPTION The W681512 is a general-purpose single channel PCM CODEC with pin-selectable -Law or A-Law companding. The device is compliant with the ITU G.712 specification. It operates from a single +5V power supply and is available in 20-pin SOG (SOP), SSOP and TSSOP package. 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. W681512 performance is specified over the industrial temperature range of 40C to +85C. The W681512 includes an on-chip precision voltage reference and an additional power amplifier, capable of driving 300 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. W681512 accepts seven master clock rates between 256 kHz and 4.096 MHz, and an on-chip pre-scaler automatically determines the division ratio for the required internal clock. ApplIcations 2. FEATURES VoIP, Voice over Networks equipment Single +5V power supply Digital telephone and communication systems Typical power dissipation of 30 mW, power-down mode of 0.5 W Wireless Voice devices Fully-differential analog circuit design and DECT/Digital Cordless phones output signals Broadband Access Equipment Differential Analog Outputs Bluetooth Headsets On-chip precision reference of 1.575 V for Fiber-to-curb equipment a 0 dBm TLP at 600 (775mV ) RMS Enterprise phones Push-pull power amplifiers with external gain adjustment with 300 load capability Digital Voice Recorders Seven master clock rates of 256 kHz to 4.096 MHz Pin-selectable -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 (40C to +85C) Pb-Free Packages: 20-pin SOG (SOP), SSOP and TSSOP Publication Release Date: January 2011 - 2 - Revision C17