Product Summary

The UCC5618QPTR is an 18-line SCSI terminator. The UCC5618QPTR 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. The UCC5618QPTR is designed with a low channel capacitance of 2pF, which eliminates effects on signal integrity from disconnected terminators at interim points on the bus.

Parametrics

UCC5618QPTR absolute maximum ratings: (1)TEMPWR: +7V; (2)Signal Line Voltage: 0V to +7V; (3)Regulator Output Current: 1A; (4)Storage Temperature: –65℃ to +150℃; (5)Operating Junction Temperature: –55℃ to +150℃; (6)Lead Temperature (Soldering, 10 Seconds): 300℃.

Features

UCC5618QPTR features: (1)Complies with SCSI, SCSI-2, SCSI-3, SPI and FAST-20 Standards; (2)2pF Channel Capacitance During Disconnect; (3)50mA Supply Current in Disconnect Mode; (4)110Ω Termination; (5)SCSI Hot Plugging Compliant, 10nA Typical; (6)+400mA Sinking Current for Active Negation; (7)–650mA Sourcing Current for Termination; (8)Trimmed Impedance to 5%; (9)Thermal Shutdown; (10)Current Limit.

Diagrams

UCC5618QPTR block diagram

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