GENERAL DESCRIPTION
The VSC7142 contains two FibreTimer Repeater /Retimer cells and Signal Detect Units (SDUs) primarily used for bidirectional signal clean up applications. Each FibreTimer cell contains an all-digital clock recovery unit which can be configured as either a Repeater or a Retimer. Repeaters recover the incoming signal and retransmit the data synchronously to the recovered clock in order to attenuate jitter so that downstream devices see high amplitude, low jitter signals.
   
FEATURES
► Two FibreTimer™ Cells Configurable as:
    - Repeaters for Low Latency
    - Retimers for True Fibre Channel Compliance
    - Provides Design Flexibility by Allowing Mixing and Matching
        of the Functions for Design Optimization
► Digital Design of the FibreTimers Produce a Device that is
    Well Controlled Over Voltage, Process and Temperature
    Variations – Provides a More Robust and Reliable Design
► Supports Both 1.0625 Gb/s and 2.125 Gb/s Fibre Channel
    Data Rates – Dual Mode Provides Flexibility by Having One
    Device for New and Legacy Designs
► Supports 1.25 Gb/s Data Rates for Gigabit Ethernet Applications
► User-Selectable, On-chip Receive Termination at Either 100Ω
    or 150Ω
► Speed Independent Tx and Rx Paths Aid in Fibre Channel
    Auto-Speed Negotiation
► World-class Signal Integrity for Jitter Compliance – Reduces
    Debug and Redesign Efforts
► Two Digital/Analog Signal Detect Units to Detect the Presence
    of Valid Fibre Channel Encoded Serial Data – Improves Signal
    Detect Reliability
► User Selectable Pre-emphasis on all High-speed Outputs –
    Compensates for Deterministic Jitter Due to Long Traces
    and Cables
► 106.25MHz or 125MHz Reference Clock
► 5V-tolerant LVTTL Inputs – Provides Design Flexibility and
    Backward Compatibility
► Cable Equalization on all High-speed Inputs – Reliably
    Recovers Jittery Signals
► Single 2.5V Supply – Reduces Wiring Complexity
► 64-pin, 10x10mm TQFP Package – Ideal for High Density
    Designs