UCC5680PW24TRG4

Overview

The UCC5680PW24TRG4 is a low-voltage differential (LVD) SCSI terminator in a 24-pin TSSOP package. It operates on a TRMPWR supply voltage ranging from 2.7 V to 5.25 V and supports an operating temperature range of 0°C to 70°C. The device provides a typical differential impedance of 105 Ω and common-mode impedance of 150 Ω, with a differential bias voltage of 125 mV. In LVD mode, the supply current is typically 35 mA, while it drops to 500 µA in disabled mode. The component includes a built-in mode change delay filter with a duration between 100 ms and 300 ms.

Feature Summary

• Integrates SPI-3 compliant mode change delay and filtering functions for bus stability
• Automatically detects driver types via DIFFSENS line and disconnects if SE or HVD drivers are present
• Provides precise impedance trimming for effective signal termination
• Biases bus lines to a failsafe state to ensure signal integrity

Applications

• Low-voltage differential SCSI bus termination
• SPI-3 compliant system implementations
• Ultra2, Ultra3/Ultra160, and Ultra320 SCSI interface designs

Procurement Notes

Verify the specific ordering suffix 'TRG4' corresponds to the tape and reel packaging quantity of 2000 units as documented in the manufacturer's ordering information. Confirm that the RoHS-compliant lead finish matches project requirements. Ensure the active status of the component aligns with long-term availability needs before finalizing procurement plans.

Selection Notes

Select this part specifically for low-voltage differential SCSI applications requiring automatic detection of single-ended or high-voltage differential drivers. Note that three ICs are required per bus end to terminate all data and control lines. Verify that the 24-pin package meets board space constraints compared to the available 28-pin variant.

Part Context

This component belongs to the UCC5680 family of SCSI terminators manufactured by Texas Instruments. The family includes both 24-pin and 28-pin TSSOP variants. The 28-pin version offers an additional LVD status output pin not present in the 24-pin configuration. Both versions share identical core termination and detection functionalities.

Replacement Considerations

The UCC5680PW24G4 serves as a direct replacement within the same package type, differing primarily in lead-free compliance specifications. No alternative functional substitutes are identified in the provided documentation.