UCC3916DP

Overview

The UCC3916DP is a SCSI Termpower Manager designed for complete power management and hot swap capability. It integrates a single high-side MOSFET rated for 1.65A with a supply voltage range of 4V to 6V. The device provides circuit breaker functions and thermal protection. It operates within a temperature range of 0°C to +70°C and is housed in an 8-SOIC package.

Feature Summary

• Integrates a single high-side MOSFET for hot swap applications
• Provides complete power management and circuit breaker functions
• Designed specifically for SCSI terminator power control

Applications

• SCSI bus terminator power management
• Hot swap controller circuits
• Circuit breaker implementation in communication systems

Procurement Notes

Verify the specific suffix 'DP' corresponds to the tube packaging variant rather than tape-and-reel, as datasheets may list both DP and DCTR variants. Confirm the operating temperature grade matches system requirements, as this part is specified for commercial temperatures (0°C to +70°C). Ensure the 4-6V input range aligns with the target SCSI power rail specifications before procurement.

Selection Notes

Select this component when designing SCSI interfaces requiring integrated hot swap protection without external discrete MOSFETs. It is suitable for systems needing a compact solution for terminator power sequencing. Consider the 1.65A current limit for load requirements. Verify that the 8-SOIC package fits the PCB layout constraints compared to larger packages used in higher power SCSI controllers.

Part Context

This device belongs to Texas Instruments' SCSI Termpower Manager family. It simplifies the design of SCSI terminators by combining power switching, current limiting, and fault protection into a single IC. It replaces complex discrete solutions involving separate MOSFETs, sense resistors, and control logic, thereby reducing board space and component count in legacy SCSI host adapters.

Replacement Considerations

Check for UCC3912 variants which may offer different pinouts or current ratings. Verify if newer generations of SCSI controllers have replaced this specific discrete manager in modern designs.