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VE8921 PRODUCT PROFILE

Dual Channel FXS + Single Channel FXO Chipset

Product Status: Production

The VE8921 chipset is a highly integrated, low-cost, 2FXS + 1FXO chipset that is optimized for residential VoIP gateways such as voice enabled DSL modems, set-top boxes, and analog terminal adapters.

The chipset implements simultaneous FXS and FXO functionality by providing the necessary voice interface functions to connect to and power a telephone and an isolated DAA for connection to the PSTN. On the digital side, the VE8921 chipset provides standard MPI and PCM interfaces to a VoIP processor.

The VE8921 chipset, coupled with Zarlink?s VoicePath? API-II (VP API-II) enables designers to offer a single hardware design that is software programmable for worldwide markets. The VP API-II 'C' code is used to abstract Zarlink?s devices from application code while providing functions for controlling, supervising, and testing a set of subscriber lines. The chipset utilizes patented low value PCB capacitors, resulting in best in class DAA performance in both common mode and RF immunity.

Detailed Block Diagram (click to enlarge)

Features & Benefits

  • Highly integrated, low-cost 1FXS + 1FXO chipset for VoIP access devices
  • Software programmable for worldwide FXS and FXO operation
  • Lowest RBOM cost in the industry
  • FXS channel performs all the standard BORSCHT functions
  • Additional FXS features:
    • Built-in DC/DC controller for high-voltage battery generation
    • Integrated balanced ringing generator with up to 92 VPK
    • 120 mW typical on-hook idle power consumption, less than half that of competing solutions
    • Wideband audio support
    • GR-909/TIA-1063 test support
  • FXO channel performs all PSTN interface functions with software programmable parameters:
    • DC mask and AC impedance
    • TX and RX signal equalization
    • DTMF and pulse dialing
    • Ring detection
  • FXO line and event monitoring:
    • on-hook voltage, off-hook current
    • Ringing, polarity reversal, Caller ID, disconnect, line in use, and parallel phone off-hook
  • Single DAA hardware design for worldwide compliance, including:
    • TIA-968-A, ETSI ES 203-021, JATE, AUSTEL, and YD/T 514
  • Adaptive DAA hybrid balance adjustment with DSL filter support
  • DAA isolation using no-cost PCB capacitors for low RBOM and exceptional common mode rejection performance
  • Direct FXO to FXS voice path with no processor buffering required
  • VoicePathTM API-II Software
    • Significantly reduces development and testing time
    • Enables modular product design with multiple combinations of FXS and FXO channels
    • Supported by SDK, development board and reference designs

      Typical Applications

      • Residential and SOHO VoIP CPE, such as ADSL2+/VDSL2 Integrated Access Devices (IADs)
      • Residential VoIP Gateways and Routers

      White Papers

      Product Packaging & Availability

      Part
      Number      		 Package
      Type       		Pin Count
      		 Lead-Free
      Option       		Shipping
      Option(s)       		Lead
      Time(wks)       		Status
      LE89116QVCLQFP48GREENTrayCONTACT ZARLINKProduction
      LE89116QVCLQFP48GREENTrayCONTACT ZARLINKProduction
      LE89116QVCTLQFP48GREENTRCONTACT ZARLINKProduction
      LE89116QVCTLQFP48GREENTRCONTACT ZARLINKProduction
      LE89316QVCLQFP48GREENTrayCONTACT ZARLINKProduction
      LE89316QVCLQFP48GREENTrayCONTACT ZARLINKProduction
      LE89316QVCTLQFP48GREENTRCONTACT ZARLINKProduction
      LE89316QVCTLQFP48GREENTRCONTACT ZARLINKProduction
      LE89810BSCSOIC16GREENTubeCONTACT ZARLINKProduction
      LE89810BSCSOIC16GREENTubeCONTACT ZARLINKProduction
      LE89810BSCTSOIC16GREENTRCONTACT ZARLINKProduction
      LE89810BSCTSOIC16GREENTRCONTACT ZARLINKProduction
      LE89900AMCMSOP10GREENTubeCONTACT ZARLINKProduction
      LE89900AMCMSOP10GREENTubeCONTACT ZARLINKProduction

      Packaging Information

      Technical Support

      Related Products
      VE8901   Single Channel FXO Chipset
      VE8910   Single Channel FXS Chipset
      VE8911   Single Channel FXS + Single Channel FXO Chipset

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