UC2903QTR

Supervisors Overview

The UC2903QTR is a quad supply and line monitor manufactured by Texas Instruments, designed for supervising multiple voltage rails in electronic systems. It operates within a maximum power supply voltage of 40 V and features adjustable overvoltage thresholds with a base threshold of 1.8 V. The device provides active low, open-drain outputs and includes programmable reset delay times to ensure stable system initialization. It is housed in a 20-PLCC package (9x9 mm) and supports surface-mount installation. The component functions reliably across an operating temperature range of -40°C to +85°C, consuming 7 mA of working power current while delivering 1.5% accuracy.

Supervisors Feature Summary

• Monitors four independent supply lines simultaneously for comprehensive system oversight
• Features adjustable overvoltage thresholds allowing customization for specific circuit requirements
• Provides active low open-drain outputs compatible with various logic families
• Includes programmable reset delay time to manage startup sequences effectively

Supervisors Applications

• Multi-rail power supply monitoring in industrial equipment
• System supervision for embedded controllers requiring quad voltage oversight
• Overvoltage protection circuits in automotive or commercial electronics

Supervisors Procurement Notes

Verify the exact package type and pinout configuration against your PCB footprint, as PLCC variants may differ from SOIC versions. Confirm that the adjustable threshold settings align with your specific voltage rail requirements before integration. Ensure compatibility with your system's logic levels given the open-drain output structure. Check for any specific handling requirements related to humidity sensitivity during assembly.

Supervisors Selection Notes

Select this component when simultaneous monitoring of four distinct voltage sources is required within a single integrated circuit. It is suitable for designs needing adjustable overvoltage detection rather than fixed thresholds. Consider the 20-PLCC package constraints regarding board space and thermal dissipation capabilities. Evaluate the 7 mA quiescent current consumption against overall system power budgets to ensure efficiency meets design goals.

Supervisors Part Context

The UC2903 series belongs to Texas Instruments' portfolio of supervisory circuits focused on multi-voltage management. Unlike simpler dual-channel monitors, this quad variant offers expanded coverage for complex power architectures. The QTR suffix indicates tape-and-reel packaging optimized for automated surface-mount assembly processes, distinguishing it from tube-packaged equivalents like the UC2903DW.

Supervisors Replacement Considerations

UC2903DW: Similar quad monitor but in SOIC-18 package; verify pin compatibility. UC2903Q: Same functional device in PLCC package; check manufacturing lot differences.