UC5601DWPTR

Overview

The UC5601DWPTR is an active terminator integrated circuit designed for SCSI and SCSI-2 bus architectures. It provides precision resistive pull-up to a 2.9V reference across all 18 lines of the interface cable. The device features internal circuit trimming that reduces resistor tolerances to ±3% and adjusts regulator output voltage to ensure termination current accuracy within ±3%. It operates with a Termpwr supply voltage range of 4.0V to 5.25V, delivering a typical termination impedance of 110 Ohms. In disconnect mode, the logic command turns off the regulator and opens termination lines, reducing standby power consumption to a maximum of 150 μA.

Feature Summary

• Active termination for 18 lines in SCSI bus cables
• Logic-controlled disconnect feature to reduce standby power
• Trimmed regulator for accurate termination current
• Negative clamping on signal lines with active negation sink capability

Applications

• SCSI-2 compliant bus systems requiring active termination
• High-speed data transfer interfaces utilizing single-ended drivers
• Systems requiring hot-plugging capabilities without electrical damage

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest documentation to confirm package type and reel specifications. Ensure compatibility with RoHS standards if required by the target application environment. Confirm availability status as product lifecycles may change, potentially affecting long-term supply continuity for design-in projects.

Selection Notes

Select this component when designing SCSI-2 compliant systems requiring precise 110 Ohm termination across 18 lines. Consider the SOIC-28 wide body package for surface mount applications where thermal performance and pin count are critical. Evaluate the disconnect threshold requirements to ensure proper integration with system control logic for power management during idle states.

Part Context

The UC5601 belongs to the family of SCSI active terminators developed to meet the stringent electrical requirements of Small Computer System Interface standards. It replaces passive resistor networks with an active solution that maintains signal integrity and supports hot-plugging operations. The DWPTR variant specifically denotes the tape and reel packaging format suitable for automated assembly processes.

Replacement Considerations

UC5601DWP

FAQ

How does the UC5601 handle signal line disconnection?

Upon receiving a logic command at the Disconnect input, the UC5601 disconnects all terminating resistors and turns off the internal regulator, significantly reducing standby power consumption.

What is the typical termination impedance provided by the UC5601?

The UC5601 provides a trimmed termination impedance of 110 Ohms, which is adjusted via internal circuit trimming to ensure accuracy within ±3%.

Does the UC5601 support hot plugging?

Yes, the device meets SCSI hot-plugging requirements by providing negative clamping on all signal lines and managing termination states to prevent electrical damage during connection or disconnection events.