DESCRIPTION

· The DS2125 is an Ultra3 LVD/SE SCSI terminator supporting both low-voltage differential (LVD) and single-ended (SE) modes.

· It automatically selects LVD or SE termination by sensing the voltage on the SCSI bus DIFFSENS line.

· For LVD termination, it integrates two current sources with 15 precision resistor strings.

· For SE termination, it uses one regulator and 15 precision 110Ω resistors.

· Two DS2125 terminators are required for a wide SCSI bus.

FEATURES

· Fully compliant with Ultra3 SCSI standards.

· Provides multimode 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).