资 源 简 介
The UCC5618 provides 18 lines of acTIve terminaTIon for a SCSI (Small Computers Systems Interface) parallel bus. The SCSI standard recommends and Fast–20 (Ultra) requires acTIve terminaTIon at both ends of the cable.
Pin for pin compatible with the UC5601 and UC5608, the UCC5618 is ideal for high performance 5V SCSI systems, Termpwr 4.0–5.25V. During disconnect the supply current is only 50µA typical, which makes the IC attractive for lower powered systems.
The UCC5618 is designed with a low channel capacitance of 2pF, which eliminates effects on signal integrity from disconnected terminators at interim points on the bus.
The power amplifier output stage allows the UCC5618 to source full termination current and sink active negation current when all termination lines are actively negated.
