GENERAL DESCRIPTION
The VSC8222 and VSC8223 are high performance, multi-rate clock and data recovery ICs that support SONET/SDH systems operating at OC-48 (STM-16), OC-12 (STM-4), OC-3 (STM-1), Fibre Channel (1.0625 Gbps and 2.125 Gbps), Gigabit Ethernet (1.25 Gbps and 2.5 Gbps), and FEC data rates. High speed input and output signals are terminated on-chip to maintain the highest degree of signal integrity possible. The devices output a differential bit clock and differential retimed data.
   
FEATURES
► Multi Rate Operation:
    - OC-48/12/3 and (STM-16/4/1) and FEC
    - 1.0625 Gbps and 2.125 Gbps Fibre Channel
    - 1.25 Gbps and 2.5 Gbps Gigabit Ethernet
► Adjustable Loop Bandwidth
► Loss of Signal (LOS) and Loss of Lock (LOL) Status Indication
► Automatic and Manual Lock to Reference Clock:
    - Internal PLL Maintains Clock Output in the Absence of Data
► Selectable CRU Bypass Mode
► On-chip Input and Output Termination
► Selectable LVPECL Reference Frequencies:
    - 19.44 MHz, 77.76 MHz, or 155.52 MHz (or FEC)
    - Equivalent Fibre Channel/Gigabit Ethernet
    - Other Allowable Frequencies
► 0.18 µm CMOS Technology
► 100 mV Differential Input Sensitivity
► 500 mV Typical Differential Data Output Swing
   
APPLICATIONS
► SONET/SDH Systems
► DWDM Systems
► Optical Transponders/Transceivers
► Fibre Channel Networks
► Gigabit and Fast Ethernet Systems
► Performance Monitoring Systems
► Optical Test Equipment