BD45371G-TR

Overview

The BD45371G-TR is a voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-input power supply lines. It features a fixed detection threshold of 3.7 V with an accuracy of ±1%. The device provides an open-drain output that goes low when the monitored voltage drops below the threshold, incorporating a manual reset function and a fixed delay time of 100 ms to prevent false triggering during power-up transients. It operates within a supply voltage range of 0.95 V to 10 V and supports a maximum operating temperature of +105 °C. Packaged in a compact SSOP-5 format, it is suitable for space-constrained embedded systems requiring reliable supervisor functionality.

Feature Summary

• Provides stable system reset signals through a fixed 100 ms delay timer to filter out transient noise during power transitions.
• Includes a manual reset input pin allowing external control over the reset state for customized initialization sequences.
• Delivers high detection accuracy of ±1% to ensure precise voltage threshold monitoring across varying load conditions.

Applications

• Microcontroller and processor power supply supervision
• Embedded system reset circuitry
• Battery-powered device voltage monitoring

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential availability constraints. Confirm RoHS compliance status and specific lot codes against current datasheet revisions before integration. Ensure storage conditions adhere to moisture sensitivity levels specified in the handling guidelines to maintain package integrity and electrical performance upon installation.

Selection Notes

Select this component when a fixed 3.7 V threshold with manual reset capability is required. Compare against the BD5237G-1 if adjustable delay times are needed instead of the fixed 100 ms delay. Consider the SSOP-5 footprint compatibility and open-drain output requirements relative to the target microcontroller's input specifications.

Part Context

Part of the BD45 series from ROHM Semiconductor, focusing on single-channel voltage detectors. This series offers various threshold voltages to suit different logic families and power rails. The BD45371G-TR specifically addresses applications needing a 3.7 V trip point with manual intervention capabilities, distinguishing it from auto-reset variants in the same family.

Replacement Considerations

BD5237G-1TR is listed as a recommended replacement with the same SSOP-5 package and 3.7 V threshold, though it features an adjustable delay timer instead of a fixed one.

FAQ

Does the BD45371G-TR support automatic reset?

No, it requires a manual reset signal via the dedicated reset pin to return to the active state after a fault condition.

What is the output configuration of this voltage detector?

It utilizes an open-drain output type, requiring an external pull-up resistor to define the high logic level.