DESCRIPTION

The LX5250/52 is a multimode SCSI terminator that is compatible with the SCSI SPI-2 (Ultra2 SCSI), SCSI SPI-3 (Ultra3 SCSI or Ultra160 SCSI), and SCSI SPI-4 (Ultra320) specifications developed by the T10 standards committee for low voltage differential (LVD) termination, while providing backwards compatibility to the SCSI, SCSI-2, and SPI single-ended specifications. Multimode compatibility permits the use of legacy devices on the bus without hardware alterations. Automatic mode selection is achieved through voltage detection on the Diffsense line.

KEY FEATURES

◾ Compliant with SCSI SPI-2 (Ultra2), SPI-3 (Ultra160), and SPI-4 (Ultra320)

◾ Auto-Selectable LVD or SingleEnded Termination

◾ Fast Response, No Output Capacitors Required

◾ Compatible with Active Negation Drivers

◾ 15µA Supply Current in Disconnect Mode

◾ Logic Command Disconnects All Termination Lines

◾ Diffsense Line Driver

◾ Ground Driver Integrated for Single-Ended Operation

◾ Current Limit and Thermal Protection

◾ Hot-Swap Compatible (SingleEnded)

◾ Available in 36-pin QSOP and 28-pin TSSOP package

◾ LX5250, 36-pin QSOP: Pin Compatible With DS2118, UCC5630A and UCC5672

◾ LX5250 28-pin TSSOP: Pin Compatible with DS2119, and UCC5672