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