SCSI Termination 5V 16-Pin SOIC W

Fast SCSI and Ultra SCSI require the use of active terminations at both ends of every cable segment in a SCSI system with single-ended drivers and receivers. The DS21T07 SCSI Terminator, which is fully compliant with these standards, enables the designer to gain the benefits of active termination: greater immunity to voltage drops on the TERMPWR (Termination PoWeR) line, enhanced high-level noise immunity, intrinsic TERMPWR decoupling, and very low quiescent current consumption. The DS21T07 integrates a regulator and nine precise switched 110 ohms termination resistors into a monolithic IC. The DS21T07 can be electrically isolated from the SCSI bus without physical removal from the SCSI device.

• Fully compliant with SCSI-1, Fast SCSI andUltra SCSI
• Backward compatible to the DS2107,DS2107A, and DS21S07
• Provides active termination for nine signallines
• Laser-trimmed 110 ohms terminationresistors have 2% tolerance
• Low droPout voltage regulator
• Power-down mode isolates terminationresistors from the bus
• SCSI bus hot-plug compatible
• Fully supports actively negated SCSI signals
• Onboard thermal shutdown circuitry
• 16-pin plastic SOIC (DS21T07S) and 20-pinplastic TSSOP (Thin Shrink Small OutlinePackage) (DS21T07E)