BD45381G-TR

Overview

The BD45381G-TR is a voltage detector from ROHM Semiconductor designed for monitoring power supply lines. It features a fixed threshold voltage of 3.8 V with ±1% precision and a fixed reset delay time of 100 ms. The device operates within a supply voltage range of 0.95 V to 10 V and supports manual reset functionality via an open-drain output. It consumes low circuit current, typically 0.80 μA when active, and functions reliably across an extended temperature range from -40°C to +105°C.

Feature Summary

• Provides precise under-voltage detection with a fixed 3.8 V threshold and high accuracy.
• Includes a fixed 100 ms delay timer to ensure stable system reset during power transitions.
• Supports manual reset input for controlled system recovery without watchdog complexity.

Applications

• Monitoring battery-powered systems requiring stable voltage thresholds
• Supervising microcontroller power supplies in industrial equipment
• Ensuring reliable startup sequences in embedded control units

Procurement Notes

Verify component authenticity through authorized channels due to obsolete status. Confirm package integrity and pin alignment against SSOP-5 specifications. Review datasheet revisions for any parameter updates prior to integration. Ensure compatibility with existing board layouts and thermal management requirements.

Selection Notes

Choose this component for applications requiring fixed delay supervision without adjustable timing complexity. Suitable for designs needing manual reset capability alongside standard voltage monitoring. Ideal for space-constrained PCBs utilizing SSOP-5 packaging while maintaining wide operating temperature ranges.

Part Context

Part of the BD45 series voltage detectors, optimized for low-power supervision tasks. Designed as a successor or alternative to older BU45 series components, offering improved precision and standardized packaging for modern electronic assemblies.

Replacement Considerations

BD5238G-1TR is listed as a recommended replacement with similar specifications and SSOP-5 package compatibility.

FAQ

Does the BD45381G-TR include a watchdog timer?

No, this component does not feature a built-in watchdog timer; it provides only voltage detection and manual reset functionality.

What is the reset active state of the output?

The output goes low during the reset active state, consistent with its open-drain configuration.