UCC5620MWP

Overview

The UCC5620MWP is a 27-line active SCSI terminator designed for high-performance 5V systems. It operates within a supply voltage range of 4V to 7V and draws 1mA to 2mA when termination lines are open, reducing to 100µA in power-down mode. The device provides a trimmed 110Ω termination impedance with a typical output current of -23.3mA at VLINE = 0.2V. It features low channel capacitance of 2.5pF during disconnect and includes thermal shutdown and current limit protection. Packaged in a 36-pin SSOP (MWP), it supports hot plugging and meets SCSI-3 specifications.

Feature Summary

• Complies with SCSI, SCSI-2, SCSI-3, SPI, and FAST-20 standards
• Provides completely hot-pluggable operation with high impedance appearance when disconnected
• Features internal circuit trimming for precise 110Ω impedance and optimized output current
• Includes logic command disconnect capability to isolate all termination lines

Applications

• High performance 5V SCSI parallel bus systems
• SCSI-3 fast operation environments requiring maximum noise margin
• Lower powered systems utilizing low standby current modes

Procurement Notes

Verify the specific package variant against the datasheet ordering information. Confirm that the MWP designation corresponds to the industry standard 36-Pin Wide Body QSOP. Ensure compatibility with existing system voltage requirements before integration.

Selection Notes

Select this component for applications requiring 27-channel active termination on SCSI buses. Consider the 4V to 7V operating range and the requirement for external decoupling capacitors as shown in typical application circuits. Evaluate thermal management needs given the junction temperature limits.

Part Context

This device belongs to the Unitrode terminator family from Texas Instruments. It is specifically engineered to eliminate signal integrity effects caused by disconnected terminators at interim points on the bus due to its low channel capacitance design.

Replacement Considerations

Consult the official datasheet for direct replacements. Verify pinout compatibility and electrical characteristics match before substituting.