UCC5620MWPTR

Overview

The UCC5620MWPTR is a Texas Instruments SCSI interface IC providing 27 lines of active termination for parallel buses. It operates within a 4V to 7V supply range and features a typical disconnect mode supply current of 100µA. The device maintains a trimmed termination impedance of 110Ω with a tolerance of ±5%. Electrical characteristics include an output leakage of 10nA to 400nA, channel capacitance of 2.5pF during disconnect, and thermal shutdown protection at 170°C. It utilizes a 36-pin SSOP package.

Feature Summary

• Complies with SCSI, SCSI-2, SCSI-3, SPI, and FAST-20 (Ultra) 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 systems requiring active termination
• Lower powered systems utilizing low standby current modes
• Parallel bus architectures needing signal integrity preservation via low channel capacitance

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest documentation to confirm package type and lead finish specifications. Confirm current production status as component availability may change over time. Ensure compatibility with existing system voltage requirements before procurement.

Selection Notes

Select this component for designs requiring standardized active termination for SCSI interfaces. Consider the 36-pin SSOP package constraints regarding board space and thermal dissipation. Evaluate the need for hot-plugging capabilities and low power consumption in idle states relative to alternative terminator solutions.

Part Context

This part belongs to the UCC5620 series of SCSI terminators manufactured by Texas Instruments. It is designed to meet industry-standard electrical specifications for SCSI parallel buses. The MWPTR designation indicates the specific 36-pin SSOP packaging configuration offered by the manufacturer.

Replacement Considerations

Consult the official datasheet for direct pin-compatible alternatives or updated versions within the same product family. Verify that any substitute component meets the exact 110Ω impedance and current sourcing/sinking requirements defined in the original specification.