UCC5672MWPTR

Overview

The UCC5672MWPTR is a multi-mode SCSI terminator integrating single-ended and low-voltage differential termination networks. It operates on a 2.7V to 5.25V supply with typical LVD mode current of 35mA and SE mode current of 25mA. The device features automatic mode selection based on the DIFSENS line voltage, supporting thresholds below 0.5V for single-ended, 0.7V–1.9V for LVD, and above 2.4V for high-impedance disconnect. It includes built-in SPI-3 mode change filters with delays between 100ms and 300ms. Electrical specifications include 105Ω differential impedance and 3pF output capacitance per line.

Feature Summary

• Auto-selection between Single-Ended and Low-Voltage Differential termination modes based on bus signals
• Integrated differential failsafe bias and noise filtering for reliable mode detection
• Compliance with SCSI-1, SCSI-2, Ultra2, Ultra3/Ultra160, and Ultra320 standards
• Supports active negation and provides high-impedance state for High Voltage Differential buses

Applications

• Multi-mode active termination for SCSI parallel interface buses
• Termination for systems coexisting with Single-Ended and Low-Voltage Differential devices
• High-speed data transfer environments requiring Ultra2, Ultra3, or Ultra320 compliance

Procurement Notes

Verify component authenticity through authorized Texas Instruments distributors or certified partners. Confirm the specific ordering suffix matches the required package type and temperature range. Review the latest datasheet revision history for any updates to electrical characteristics or pin configurations before finalizing procurement orders.

Selection Notes

Select this component for applications requiring automatic transition between SE and LVD SCSI termination without manual configuration. Ensure the system design accommodates the 28-pin TSSOP package thermal requirements via HS/GND pins. Verify that the board layout supports the necessary 120Ω impedance standards and capacitance balance limits specified for Ultra2 and higher speeds.

Part Context

This device belongs to the Unitrode/Texas Instruments family of SCSI terminators designed for legacy and transitional storage interfaces. It addresses the industry shift from High Voltage Differential to Low Voltage Differential signaling while maintaining backward compatibility with Single-Ended devices. The MWPTR designation indicates a specific tape-and-reel packaging variant of the 28-pin TSSOP form factor.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Users should consult Texas Instruments for current equivalent recommendations or updated product lines replacing obsolete variants.