UCC5614DP

Overview

The UCC5614DP is an obsolete nine-line active terminator for SCSI parallel buses, designed for 3.3-V systems with a 2.7-V to 5.25-V operating range. It features a 0.1-V drop-out regulator and provides 110-Ω or 2.5-kΩ programmable termination. The device operates in the 0°C to 70°C temperature range within a 16-pin SOIC package. Electrical characteristics include a typical supply current of 2 mA when active and 0.5 µA in disconnect mode. Output impedance is trimmed to 7%, while output current is trimmed to 4%. The device supports hot plugging and includes thermal shutdown and current limit protection.

Feature Summary

• Complies with SCSI, SCSI-2, and SPI-2 single-ended standards
• Ultra-low channel capacitance of 1.8 pF during disconnect
• Programmable termination for standard (110 Ω) and short bus (2.5 kΩ) applications
• Integrated thermal shutdown and current limit protection

Applications

• High-performance 3.3-V SCSI systems
• Battery-powered systems requiring low power consumption
• Short bus applications utilizing 2.5-kΩ termination

Procurement Notes

Verify component obsolescence status before procurement planning. Confirm that the specific 16-pin SOIC package variant meets mechanical requirements. Review datasheet specifications against system voltage and temperature constraints. Ensure design-in compatibility with existing SCSI bus architectures. Consult manufacturer archives for final availability details.

Selection Notes

Evaluate the 16-pin narrow body SOIC package for thermal resistance and board space constraints. Compare the 110-Ω and 2.5-kΩ termination options based on bus length requirements. Assess the impact of the 0.5 µA disconnect mode current on battery life. Verify pinout compatibility with legacy Unitrode terminators for direct upgrades.

Part Context

The UCC5614 series serves as a specialized interface solution for SCSI parallel bus architectures. It replaces older discrete termination networks by integrating nine active lines into a single IC. The device maintains backward compatibility with previous generations while offering improved electrical performance through precise trimming and lower operating voltages.

Replacement Considerations

The UCC5614N and UCC5614PW are pin-for-pin compatible alternatives within the same family. These variants offer different packaging options while maintaining identical functional specifications. Verify package dimensions and thermal characteristics when selecting a substitute.