DS2120B

Ultra3 LVD SCSI Terminator


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Description

The DS2120 Ultra3 LVD SCSI terminator is a low-voltage differential (LVD) terminator. If the device is connected in an LVD-only bus, the DS2120 uses LVD termination. If any single-ended (SE) or highvoltage differential (HVD) devices are connected to the bus, the DS2120 disconnects from the bus. This is accomplished inside the part automatically by sensing the voltage on the SCSI bus DIFFSENS line.

For the LVD termination, the DS2120 integrates two current sources with nine precision resistor strings. Three DS2120 terminators are needed for a wide SCSI bus.

Key Features

  • Fully Compliant with Ultra3, Ultra160, Ultra320, and Ultra2 (LVD only) SCSI
  • Provides Low-Voltage Differential (LVD) Termination for Nine Signal Line Pairs
  • Zero Temperature Coefficient Termination Resistors
  • Autoselection of LVD Termination
  • 5% Tolerance on LVD Termination Resistance
  • Low Power-Down Capacitance of 3pF
  • Built-In Mode Change Filter/Delay
  • On-Board Thermal Shutdown Circuitry
  • SCSI Bus Hot Plug Compatible
  • Applications/Uses

    • Network-Attached Storage (NAS)
    • RAID Systems
    • SCSI Cables
    • SCSI Host Bus Adapter (HBA) Cards
    • Servers
    • Storage Area Networks (SANs)

    Quality and Environmental Data

    Request Reliability Report for: DS2120B 
    Lead-Free Package Tin (Sn) Whisker Reports
    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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