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The UCC5686 is a twenty-seven line active terminator for low-voltage-differential (LVD) SCSI networks. This LVD SCSI-only design allows the user to reach peak bus performance, while reducing system cost. The device is designed as an active Y-terminator to improve the frequency response of the LVD SCSI Bus. Designed with 2-pF (typical) channel capacitance, the UCC5686 allows for minimal bus loading for a maximum number of eripherals. With the UCC5686, the designer is able to comply with the Ultra2, Ultra3, Ultra160, and Ultra320 SCSI specifications. The UCC5686 also provides a much-needed system migration path for the ever improving SCSI system standards. This device is available in the 64-pin low-profile QFP package for ease of layout use. Single-ended (SE) and high-voltage differential (HVD) SCSI drivers are not supported.
UCC5686PMTRG4 Maximum Ratings
Input voltage VIN (STRMPWR, PTRMPWR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V Signal line input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to 5 V Regulator output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.75 A Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55°C to 150°C Operating virtual junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55°C to 150°C Lead temperature (soldering, 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300°C † Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended erating conditions" is not mplied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. ‡ Unless otherwise indicated, voltages are reference to ground and currents are positive into and negative out of e specified terminals. Consult Packaging Section of the Interface Products Data Book (TI Literature Number SLUD002) for thermal limitations and considerations of packages. All voltages are referenced to GND.
UCC5686PMTRG4 Features
` SCSI SPI-2, SPI-3, Ultra2, Ultra3, Ultra160 Ultra320 SCSI Compliance ` Smallest Footprint ` Lowest Channe Capacitance, 2 pF ` Less than 0.5-pF CapacitanceDifferential Between Pairs ` 2.7 V to 5.25 V Operation ` Differential Failsafe Bias ` Builtin SPI-3 Mode Change/Filter Delay ` 64-Pin Low Profile QFP
