BU45K372G-TL

Overview

The BU45K372G-TL is a fixed-delay time voltage detector manufactured by ROHM Semiconductor, designed for supervisory circuit applications. It features an open-drain output and monitors a single input with a threshold voltage of 3.7 V. The device operates within a supply voltage range of 0.6 V to 6 V and provides a reset delay time of 200 ms. It exhibits a detection accuracy of ±1% and consumes a typical operating current of 2.8 µA. The component is housed in an SSOP-3 package and supports operation from -40°C to +105°C.

Feature Summary

• Provides precise voltage monitoring with high detection accuracy
• Features low power consumption suitable for battery-operated systems
• Delivers stable reset signals via open-drain output configuration

Applications

• Portable electronic devices requiring voltage supervision
• Battery-powered equipment needing under-voltage protection
• Embedded systems utilizing microcontroller reset circuits

Procurement Notes

Verify the NRND status before procurement, as this component is not recommended for new designs. Confirm that existing inventory meets project requirements. Ensure compatibility with SSOP-3 mounting styles. Check for RoHS compliance details in official documentation. Validate lead times due to potential discontinuation risks associated with legacy parts.

Selection Notes

Select this part when a fixed 3.7 V threshold and 200 ms delay are required. Consider the SSOP-3 package constraints for PCB layout. Evaluate the 2.8 µA current draw against system power budgets. Compare performance with newer alternatives if long-term supply assurance is critical for the product lifecycle.

Part Context

This component belongs to the BU45/BU46 series of voltage detectors. It serves as a specific variant within ROHM's supervisory IC portfolio, offering a balance of precision and low power. The part is distinct from adjustable delay models and manual reset variants within the same family.

Replacement Considerations

The BD5237G-1 is listed as a similar specification replacement. Verify package differences (SSOP-5 vs SSOP-3) and parameter variations such as hysteresis and current consumption before substitution.