BU4333F-TR

Overview

The BU4333F-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-input power supply voltages. It features an adjustable reset delay timer and operates within a supply voltage range of 0.7 V to 7 V. The typical under-voltage detection threshold is 3.3 V with a precision of ±1%. The device draws a maximum operating current of 550 nA and supports an extended temperature range from -40°C to +125°C. It utilizes an SOP-4 surface-mount package and provides a CMOS output type without manual reset or watchdog functionality.

Feature Summary

• CMOS voltage detection with adjustable reset delay timer
• Ultra-low power consumption suitable for battery-operated systems
• High accuracy voltage monitoring with wide operating temperature range

Applications

• Portable electronic devices requiring low standby current
• Battery-powered equipment needing reliable voltage supervision
• Embedded systems utilizing CMOS logic interfaces

Procurement Notes

Verify component authenticity through authorized distributors as the part status may be obsolete. Confirm package integrity and pin alignment against the official datasheet specifications before integration. Ensure environmental compliance documentation matches project requirements due to potential lifecycle changes.

Selection Notes

Select this component when a fixed 3.3 V threshold with high precision is required alongside minimal quiescent current. The adjustable delay feature allows customization for specific system startup sequences. Consider the SOP-4 footprint constraints and CMOS output drive capabilities during circuit design.

Part Context

This component belongs to the BU42(43)xxF series of supervisory circuits. It shares functional similarities with other models in the family but differs in specific threshold voltages and packaging options. The series is characterized by low power consumption and high accuracy for general-purpose voltage monitoring applications.

Replacement Considerations

The BD5233G-1 is listed as a recommended alternative with similar pinout compatibility. Verify electrical parameter alignment and package dimensions before substitution.