BU4320F-TR

Overview

The BU4320F-TR is a low voltage detector IC manufactured by ROHM Semiconductor, designed for monitoring power supply voltages. It features an adjustable delay time function and operates within a detection threshold range of 0.7V to 7V. The typical under-voltage detection voltage is 2.0V with a precision of ±1%. The device supports CMOS and open drain output types, with a reset active state of low. It consumes 0.40μA in the on state and 0.55μA in the off state at Vdet=4.8V. The component is housed in an SOP4 package and is currently classified as obsolete.

Feature Summary

• Provides low voltage detection with adjustable output delay timing
• Supports CMOS and open drain output configurations
• Operates across a wide reset active voltage range

Applications

• Power supply supervision in electronic systems
• Microcontroller reset circuit generation
• Battery voltage monitoring applications

Procurement Notes

Verify availability status carefully as this component is listed as obsolete or last-time buy in official documentation. Confirm exact package type and suffix requirements with the manufacturer or authorized distributors before ordering, as supply chain constraints may affect lead times and sourcing options for discontinued parts.

Selection Notes

Select this component when a fixed 2.0V detection threshold with adjustable delay is required. Ensure compatibility with CMOS logic levels if using the standard output type. Consider the BD5220G-1 as a potential replacement if pinout compatibility and similar electrical characteristics are acceptable for the design.

Part Context

This part belongs to ROHM's BU43xx series of low voltage detectors. These devices are engineered for reliable power management in portable and industrial electronics. The series emphasizes low current consumption and flexible output options to support various system reset requirements.

Replacement Considerations

The BD5220G-1 is identified as a similar level replacement with the same pinout. Verify that the BD5220G-1 meets all electrical specifications and package requirements for the existing design implementation.