UCC5614N

Lowest Capacitance 9-Line 3-5V SE Terminator for SCSI Through Ultra SCSI

DESCRIPON

The UCC5614 provides 9 lines of active termination for a small computer system’s interface SCSI parallel bus. The SCSI standard recommends active termination at both ends of the cable segment.

The UCC5614 is ideal for high performance 3.3-V SCSI systems. The key features contributing to such low operating voltage are the 0.1-V drop-out regulator and the 2.7-V reference. During disconnect the supply current is typically only 0.5 µA, which makes the device attractive for battery powered systems

FEATURES

• Complies with SCSI, SCSI−2 and SPI−2 Single Ended Standards

• 2.7-V to 5.25-V Operation

• 1.8-pF Channel Capacitance during Disconnect

• 0.5-µA Supply Current in Disconnect Mode

• 110-Ω/2.5-kΩ Programmable Termination

• Completely Meets SCSI Hot Plugging

• −400-mA Sourcing Current for Termination

• +400-mA Sinking Current for Active Negation Drivers

• Trimmed Termination Current to 4%

• Trimmed Impedance to 7%

• Current Limit and Thermal Shutdown Protection