BU4328F-TR

Overview

The BU4328F-TR is a standard voltage detector manufactured by ROHM Semiconductor, designed for monitoring power supply levels in electronic circuits. It features an adjustable reset delay timer and operates within a wide supply voltage range of 0.7 V to 7 V. The device provides high detection precision with a typical threshold accuracy of ±1% and includes hysteresis to prevent output oscillation during voltage transitions. Packaged in a compact SOP-4 format, it supports surface-mount installation and functions reliably across an extended industrial temperature range from -40°C to +125°C.

Feature Summary

• Adjustable reset delay timer functionality
• High detection precision with ±1% accuracy
• Wide operating supply voltage range up to 7 V
• Industrial temperature rating from -40°C to +125°C

Applications

• Portable equipment power management
• Battery-operated system supervision
• Microcontroller reset circuitry
• General-purpose voltage monitoring

Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm package integrity and pin alignment against SOP-4 specifications. Validate datasheet revisions for parameter consistency. Ensure storage conditions maintain moisture sensitivity level requirements prior to assembly.

Selection Notes

Evaluate compatibility with target supply voltage ranges and required reset thresholds. Consider the adjustable delay feature for noise immunity needs. Assess thermal performance within the specified operating temperature limits. Verify interface requirements match the CMOS output characteristics provided in official documentation.

Part Context

This component belongs to the BU42(43)xxF series of supervisory circuits from ROHM Semiconductor. It serves as a dedicated voltage monitor for ensuring stable operation in low-voltage applications. The series is characterized by low power consumption and precise detection capabilities suitable for portable devices.

Replacement Considerations

BD5228G-1TR is documented as a recommended replacement with similar specifications.