General Description
The VSC8141 is a SONET/SDH compatible 3.3V multi-rate transceiver with integrated clock generator for use in SONET/SDH systems operating at OC-48, OC-24, OC-12, OC-3, or Gigabit Ethernet data rates. The internal clock generator uses a phase-locked loop (PLL) to multiply either a 77.76MHz or 155.52MHz reference clock for internal logic and output retiming.
   
Features
• Multi-Rate Transceiver for SONET OC-48, OC-24
    OC-12, OC-3, and Gigabit Ethernet Rates
• 16-Bit LVPECL Low-Speed Interface
• On-Chip PLL-Based Clock Generator
• High-Speed Clock Output Power-Down Option
• Equipment, Facility and Split Loopback Modes
• Loss of Signal (LOS) Detect Input
• Exceeds Bellcore Jitter Specifications
• Single 3.3V Power Supply
• 1.8 W Typical Power Dissipation
• Packages: 128-Pin PQFP (14x20x2mm) or
    208-Pin TBGA 23x23x1.55mm)