SLVS065D - NOVEMBER 1991 - REVISED SEPTEMBER 1996
The TL-SCSI285 is a low-dropout (0.7-V) fixed-voltage regulator specifically designed for small computer systems interface (SCSI) alternative 2 active signal termination. The TL-SCSI285 0.7-V maximum dropout ensures compatibility with existing SCSI systems while providing a wide TERMPWR voltage range. At the same time the ±1% initial tolerance on its 2.85-V output voltage ensures a tighter line driver current tolerance, thereby increasing the system noise margin.
The fixed 2.85-V output voltage of the TL-SCSI285 supports the SCSI alternative 2 termination standard while reducing system power consumption. The 0.7-V maximum dropout voltage brings increased TERMPWR isolation, making the device ideal for battery-powered systems. The TL-SCSI285, with internal current limiting, overvoltage protection, ESD protection, and thermal protection offers designers enhanced system protection and reliability.
When configured as a SCSI active terminator, the TL-SCSI285 low-dropout regulator eliminates the 220-
and the 330- resistors required for each transmission line with a passive termination scheme, reducing significantly the continuous system power drain. When placed in series with 110- resistors, the device matches the impedance level of the transmission cable and eliminates reflections.
The TL-SCSI285 is characterized for operation from 0°C to 125°C virtual junction temperature. The TL-SCSI285M is characterized for operation from -55°C to 125°C virtual junction temperature.
View more information about generic part numbers:TL-SCSI285
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