UCC5617DWP

Overview

The UCC5617DWP is an 18-line SCSI active terminator in a 28-pin wide-body SOIC package. It provides 110-ohm termination impedance trimmed to 5% accuracy, with output sourcing current of -650mA and sinking current of +400mA for active negation. Operating on TRMPWR between 4.0V and 5.25V, the device draws 50µA typical supply current in disconnect mode. Channel capacitance during disconnect is 2pF, ensuring signal integrity. The IC supports hot plugging with 10nA typical leakage and includes thermal shutdown at 170°C.

Feature Summary

• Complies with SCSI, SCSI-2, SCSI-3, SPI, and FAST-20 standards
• Provides 18 lines of active termination with reverse disconnect capability
• Features low channel capacitance of 2pF during disconnect to preserve signal integrity
• Supports SCSI hot plugging with high impedance state when disabled

Applications

• High-performance 5V SCSI systems requiring active termination
• Fast-20 (Ultra) SCSI bus implementations mandating active termination
• Systems requiring hot-pluggable SCSI interface components

Procurement Notes

Verify component authenticity through authorized Texas Instruments distributors or certified partners. Confirm RoHS compliance status and lead finish specifications against the latest datasheet revision. Ensure the DWP package variant matches design requirements for thermal management and pin compatibility. Validate that the lifecycle status aligns with long-term availability needs.

Selection Notes

Select this component for designs requiring 18-channel SCSI termination with precise 110-ohm impedance control. Consider the 28-pin wide-body SOIC package for adequate thermal dissipation. Verify power supply voltage ranges match the system's TRMPWR specifications. Evaluate the need for active negation capabilities and hot-plug support in the target application environment.

Part Context

The UCC5617 belongs to the Unitrode family of SCSI terminators, offering pin-for-pin compatibility with the UC5609. It is designed for high-performance SCSI environments where signal integrity and noise margin are critical. The device integrates internal circuit trimming for optimal performance across temperature variations.

Replacement Considerations

UC5609 is a pin-compatible alternative within the same product family.