W681310 W681310 3V SINGLE CHANNEL VOICEBAND CODEC Data Sheet Revision B18 - 1 - W681310 1. GENERAL DESCRIPTION The W681310 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 +3V power supply and is available in 20-pin SOG, SSOP and TSSOP package options. Functions performed include digitization and reconstruction of voice signals, and band limiting and smoothing filters required for PCM systems. W681310 performance is specified over the industrial temperature range of 40 C to +85 C. The W681310 includes an on-chip precision voltage reference and an additional power amplifier, capable of driving 300 loads differentially up to a level of 3.544V 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. W681310 accepts eight master clock rates between 256 kHz and 4.800 MHz, and an on-chip pre-scaler automatically determines the division ratio for the required internal clock. For fast evaluation and prototyping purposes, the W681310DK development kit is available. ApplIcations 2. FEATURES VoIP, Voice over Networks Single +3V power supply (2.7V to 5.25V) Digital telephone and communication Typical power dissipation of 10 mW, systems power-down mode of 0.5 W Wireless voice devices Fully-differential analog circuit design PABX/SOHO systems On-chip precision reference of 0.886 V for Local loop card a -5 dBm TLP at 600 SOHO routers Push-pull power amplifiers with external Fiber-to-curb equipment gain adjustment with 300 load capability Enterprise phones Eight master clock rates of 256 kHz to 4.800 MHz ISDN equipment Pin-selectable -Law and A-Law Modems/PC cards companding (compliant with ITU G.711) Digital Voice Recorders CODEC A/D and D/A filtering compliant with ITU G.712 Industrial temperature range (40 C to +85 C) Packages: 20-pin SOG (SOP), SSOP and TSSOP Pb-Free package options available Publication Release Date: February 2015 - 2 - Revision B18