BU4331FVE-TR

Overview

The BU4331FVE-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-input power supply lines. It features an adjustable reset delay timer and operates within a maximum supply voltage of 7 V. The device provides a typical threshold voltage of 3.1 V with a precision of ±1%. It functions in a temperature range from -40°C to +125°C and consumes a static current of 550 nA. The component is housed in a VSOF-5 surface-mount package.

Feature Summary

• CMOS output structure for low-power operation
• Adjustable reset delay timer functionality
• High accuracy voltage detection with ±1% precision

Applications

• Portable electronic devices requiring low standby current
• Battery-powered systems needing reliable under-voltage monitoring
• General-purpose supervisory circuits in consumer electronics

Procurement Notes

Verify the specific suffix and package variant against the official datasheet before procurement. Confirm that the VSOF-5 footprint matches the design layout. Check for end-of-life status or last-time-buy notices as availability may be restricted. Ensure compatibility with the target operating temperature range and supply voltage requirements.

Selection Notes

Select this component when a single-channel voltage monitor with adjustable timing is required. Compare the 3.1 V threshold against system brown-out limits. Evaluate the 550 nA static current against total battery life constraints. Verify that the VSOF-5 package dimensions fit the available PCB space.

Part Context

This part belongs to the BU42(43)xxF series of voltage detectors. It shares functional similarities with other members like the BU4330F-TR but differs in package type and specific threshold characteristics. The series is characterized by low power consumption and high precision detection capabilities suitable for portable applications.

Replacement Considerations

The BD5231G-1 is listed as a recommended alternative with the same pinout configuration. Verify electrical parameter compatibility, particularly the reset active voltage range and output drive capability, before substituting.