NUVOTON W681512RG

The W681512 is a general-purpose single channel PCM CODEC with pin-selectable μ -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 -40°C to +85°C. The W681512 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. 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.

• Single +5V power supply
• Typical power dissipation of 30 mW, power-down mode of 0.5 μW
• Fully-differential analog circuit design and output signals
• Differential Analog Outputs
• On-chip precision reference of 1.575 V for a 0 dBm TLP at 600Ω (775mVRMS)
• Push-pull power amplifiers with external gain adjustment with 300Ω load capability
• Seven master clock rates of 256 kHz to 4.096 MHz
• 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)
• Pb-Free Packages: 20-pin SOG (SOP), SSOP and TSSOP

• VoIP
• Voice over Networks equipment
• Digital telephone and communication systems
• Wireless Voice devices
• DECT/Digital Cordless phones
• Broadband Access Equipment
• Bluetooth Headsets
• Fiber-to-curb equipment
• Enterprise phones
• Digital Voice Recorders