BU4331G-TR

Overview

The BU4331G-TR is a CMOS low-voltage detector manufactured by ROHM Semiconductor, designed for monitoring power supply integrity. 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 3.1 V with a precision of ±1%. The device draws a circuit current of 0.40 μA (ON) and 0.55 μA (OFF) at VDET=4.8V. It utilizes an SSOP-5 package and supports an operating temperature range from -40°C to 125°C.

Feature Summary

• CMOS output type providing digital reset signaling
• Adjustable reset delay timer functionality
• High accuracy voltage detection with hysteresis

Applications

• Microprocessor system supervision
• Battery-powered equipment monitoring
• Portable electronic device power management

Procurement Notes

Verify component authenticity through authorized channels due to the Not Recommended for New Designs status. Confirm package integrity and pin alignment against the SSOP-5 specification. Ensure compatibility with existing PCB footprints and thermal requirements before integration into final assemblies.

Selection Notes

Select this component for applications requiring precise voltage monitoring with customizable timing delays. Consider the CMOS output drive capability and low standby current for battery-sensitive designs. Evaluate the wide operating temperature range for industrial or automotive environments where stability is critical.

Part Context

This part belongs to the BU42(43)xxG series of supervisory circuits. It serves as a dedicated voltage monitor within ROHM's power management portfolio, offering reliable performance for system reset generation in compact surface-mount configurations.

Replacement Considerations

The BD5231G-1 is identified as a recommended replacement with the same pinout and package. Verify electrical parameter alignment, particularly regarding output type differences between CMOS and open-drain configurations.