UCC5519PWPG4

Overview

The UCC5519PWPG4 is a multimode SCSI terminator manufactured by Texas Instruments, designed to support SCSI-2, Ultra2 (SPI-2), Ultra3/Ultra160 (SPI-3), and Ultra320 (SPI-4) standards. It operates on a 2.7-V to 5.25-V supply voltage and integrates the SPI-3 mode change delay function. The device features a 28-pin TSSOP PowerPAD package and includes built-in regulators with a minimum source current of 225 mA in LVD mode. It provides differential termination impedance of 100 Ω to 110 Ω and single-ended termination impedance of 100 Ω to 116 Ω. The component detects bus types via the DIFFSENSE line and disconnects automatically if High-Voltage Differential (HVD) devices are detected.

Feature Summary

• Integrates automatic mode detection for SCSI-2 through Ultra320 standards with built-in SPI-3 delay filtering
• Provides high-current regulation supporting Single-Ended operation with all nine lines low
• Automatically enters high-impedance state upon detecting incompatible HVD SCSI drivers

Applications

• Termination for SCSI-2 and Ultra2 (SPI-2) peripheral buses
• Termination for Ultra3/Ultra160 (SPI-3) data transmission systems
• Termination for Ultra320 (SPI-4) high-speed storage interfaces

Procurement Notes

Verify the PWP suffix indicates the PowerPAD TSSOP-28 package variant. Confirm the G4 suffix aligns with lead-free manufacturing specifications required by your assembly process. Ensure the operating temperature range matches your system's thermal environment, as this specific part number corresponds to the standard commercial grade.

Selection Notes

Select this component when designing systems requiring compliance with Ultra320 or earlier SCSI standards. It is suitable for applications needing integrated mode switching without external logic. Verify that the board layout supports the PowerPAD thermal pad requirements for adequate heat dissipation during continuous operation.

Part Context

This device belongs to the UCC5519 family of multimode SCSI terminators. It serves as a direct replacement for legacy terminators while adding support for newer Ultra320 specifications. The integration of the mode change delay simplifies design compared to discrete solutions, reducing component count and board space requirements.

Replacement Considerations

The UCC5519PWP is the base equivalent part number. Check datasheet documentation for any specific ordering suffix variations regarding tape-and-reel availability versus tube packaging.