Pro-X Dual Programmable Extended CODEC/SLCC

The W682388 implements a dual channel FXS telephone line interface optimized for short loop applications. It integrates dual SLCC (Subscriber Line Control Circuit) functionality with a dual channel programmable CODEC. The SLCC supports internal ringing up to 90VPK (5REN at 4kft) ideal for customer premise equipment (CPE). The CODEC can be configured for µ-law/A-law or 16-bit linear PCM encoding and supports a comprehensive set of signaling capabilities required to supervise and control both telephone lines. These include tone generation, including ring tones, DTMF generation and detection as well as FSK and metering pulse generation. An on-chip dual pulse width modulation (PWM) driver allows the control of DCDC conversion for each line. Programmable impedance and transhybrid balancing allow for worldwide deployment.

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All packages available in Pb-free
 
 
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Block Diagram
Key Features
  • Performs complete BORSCHT functions for two channels on a single device
  • Internal balanced ringing up to 90VPK (5REN up to 4kft)
  • Integrated Power Management
    • Integrated PWM controls line voltage to minimize power dissipation in all operating modes
  • Programmable linefeed characteristics
    • Ringing frequency, amplitude, cadence
    • Trapezoidal and sinusoidal waveforms
    • Two-wire AC impedance, transhybrid balance
    • Constant current feed (20 to 41mA)
    • Ring trip and loop closure thresholds
  • Loop test and diagnostics support
    • Integrated loopback modes
    • Realtime linefeed monitor
  • Programmable signal generation
    • DTMF generation and detection
    • Metering pulse generation (12/16kHz)
    • Caller ID (FSK) generation
    • Tone generation (up to four simultaneous)
    • G.711 µ-Law/A-Law / 16-bit linear PCM audio
    • Programmable audio path gains
  • PCM and SPI bus digital interfaces
  • On-chip PLL for flexible clocking options
  • 3.3V operation
  • Small Footprint Packages: LQFP-64, QFN-64
Benefits
Applications
  • High integration reduces overall system BOM and footprint
  • Low power consumption for battery-backup and other
    power sensitive applications
  • High programmability reduces real-time software overhead
  • Extensive line sensing enables diagnostics support
  • Analog Telephone Adapter
  • Voice enabled DSL Modems
  • Voice enabled Cable Modems
  • Residential VoIP Gateways / Routers
  • Integrated Access Devices
  • Fiber to the Premise/Home (FTTP/H)
  • Optical Network Terminals (ONT)
  • Set Top Boxes
  • Wireless Local Loop, PBX, ISDN NT1/TA

Application Diagram

Product Selection Guide
Part Number
Description
Package
W682388DG
Dual channel FXS telephone line interface, µ-law/A-law or 16-bit linear PCM
LQFP-64 Pb-Free
W682388YG
Dual channel FXS telephone line interface, µ-law/A-law or 16-bit linear PCM
QFN-64 Pb-Free