General Description
The VSC8122 is a single-chip clock recovery IC for use in SONET OC-48, OC-24, OC-12, OC-3, or Giga-bit Ethernet systems operating at their respective 2.48832Gb/s, 1.24416Gb/s, 622.08Mbps, 155.52Mbps, or 1.25Gbps data rates. The VSC8122 complies with SONET jitter tolerance, jitter transfer and jitter generation specifications.
   
Features
• Multi-Rate OC-3, OC-12, OC-24, OC-48 Clock
    and Data Recovery
• Supports Gigabit Ethernet
• Differential Back Terminated I/O
• Maintains Clock Output in the Absence of Data
• Selectable Reference Clock
• Loss of Lock Indicator
• Exceeds SONET/SDH Requirements for Jitter
    Tolerance, Jitter Transfer and Jitter Generation.
• 3.3V Supply Operation
• 1W Typical Power
• 64-pin , 10x10mm PQFP Packaging