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DS2120, DS2120B, DS2120E
Ultra3 LVD SCSI Terminator


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Description
FULL DATA SHEET (PDF, 492kB)
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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   Applications/Uses
  • 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

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

    Key Specifications:   SCSI Terminators
    Part Number Interface Standards Single-Ended Low Voltage Differential High Voltage Differential Tolerance (%) Number of Channels
    DS2120  Ultra 160
    Ultra 320
    Ultra2 SCSI
    Ultra3 SCSI
    No Yes No 5 9 Diff.
    See All SCSI Terminators (11)

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    2006-01-05
    This page last modified: 2007-07-06



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