GENERAL DESCRIPTION

The DS2125 Ultra3 LVD/SE SCSI terminator is both a low-voltage differential (LVD) and single-ended (SE) terminator. The multimode operation enables the designer to implement LVD in current products while allowing the end user SE backward compatibility with legacy devices. If the device is connected in an LVD-only bus, the DS2125 uses LVD termination. If any SE devices are connected to the bus, the DS2125 uses SE termination, which is accomplished automatically inside the part by sensing the voltage on the SCSI bus DIFFSENS line.

FEATURES

■ Fully Compliant with Ultra3 SCSI

■ Provides Multimode Low-Voltage Differential/Single-Ended (LVD/SE) Termination for 15 Signal Line Pairs

■ Auto-Selection of LVD or SE Termination

■ 5 Tolerance on SE and LVD Termination Resistance

■ Low 3pF Power-Down Capacitance

■ On-Board Thermal-Shutdown Circuitry

■ SCSI Bus Hot-Plug Compatible

■ Fully Supports Actively Negated SE SCSI Signals

APPLICATIONS

    Raid Systems

    SCSI Host Bus Adapter (HBA) Cards

    Servers

    SCSI Cables

    Network Attached Storage (NAS)

    Storage Area Networks (SANs)