UCC5629FQP

Overview

The UCC5629FQP is a multimode SCSI terminator in a 48-pin LQFP package, operating from 0°C to 70°C. It supports 2.7-V to 5.25-V supply voltage and automatically detects bus type via the DIFFB pin. The device provides single-ended (SE) termination with 110 Ω impedance and low-voltage differential (LVD) termination with 105 Ω typical differential impedance. Electrical characteristics include a TRMPWR supply current of 25 mA in LVD mode and 10 mA in SE mode. Integrated regulators provide 1.25 V, 1.3 V, and 2.7 V outputs for biasing and termination requirements.

Feature Summary

• Automatically senses the SCSI bus state and switches between single-ended and low-voltage differential termination modes
• Provides thermal packaging with heat-sink ground pins to reduce junction temperature and improve reliability
• Includes differential failsafe biasing to ensure signal integrity during mode transitions
• Features reversed polarity disconnect capability to protect the device when not positioned at the bus end

Applications

• SPI-2 (Ultra2) and SPI-3 (Ultra3) SCSI parallel interface systems
• SPI-4 (Ultra320) high-speed data transfer architectures
• Multimode SCSI bus environments requiring seamless transition between SE and LVD devices

Procurement Notes

Verify that the component matches the specific UCC5629FQP designation within the LQFP-48 package family. Confirm the operating temperature range aligns with the 0°C to 70°C specification required for your application environment. Ensure proper handling procedures are followed due to limited built-in ESD protection mechanisms inherent to the MOS gate structure.

Selection Notes

Select this component for applications requiring automatic detection of SCSI bus types without external logic control. It is suitable for designs needing integrated power regulation for termination voltages. Consider the thermal performance benefits of the LQFP package for systems where junction temperature management is critical for long-term operational stability.

Part Context

This device belongs to the UCC5629 series of multimode SCSI terminators manufactured by Texas Instruments. It serves as a bridge technology allowing legacy single-ended SCSI devices to coexist with newer low-voltage differential implementations on the same bus architecture.

Replacement Considerations

The UCC5629FQPTR is available in a tape-and-reel configuration for automated assembly processes while maintaining identical electrical specifications.