General Description
The VSC8123 is a universal clock and data recovery system designed for a broad range of system applications. The integrated frequency synthesizer provides continuous coverage from 10Mb/s to OC-48+FEC data rates with SONET quality output. In addition to its broadband capability, the VSC8123 is designed for the most demanding applications, where signal integrity is low and the absolute maximum voltage and timing margin is required. The VSC8123 offers signal acquisition capabilities far beyond what conventional CDRs offer, in a highly monolithic form.

Features
• Continuous NRZ Frequency Coverage from 10Mb/s to 2.7Gb/s data rates
• Programmable Acquisition and Tuning of Frequency, Phase and Voltage—No Reference Clock Required
• Built-In Bit Level Error Rate Monitoring Operates Independently of In-Service Data Channel
• User-Definable Control Algorithms for Acquisition, Tracking, and Error Profiling
• Integrated High-Gain AGC Front End with Offset Correction and On-Die Termination
• Secondary High-Level Input for Backup Data Input or hint/LOS Clock
• 80-Pin PQFP Package