BU4343FVE-TR

Overview

The BU4343FVE-TR is a voltage detector from ROHM Semiconductor featuring an adjustable delay timer and CMOS output. It provides a detection threshold of 4.3V with ±1% precision. The device operates within a reset active voltage range of 0.7V to 7V and supports a maximum supply voltage of 7V. It consumes low circuit current, typically 0.40μA when ON and 0.55μA when OFF at VDET=4.8V. The component utilizes a VSOF5 package (1.6x1.6mm) and functions across a temperature range of -40°C to 125°C.

Feature Summary

• Adjustable delay timer functionality for customized reset timing
• High precision voltage detection with ±1% accuracy
• Low power consumption suitable for battery-operated systems
• CMOS output type ensuring compatibility with digital logic

Applications

• Portable electronic devices requiring low voltage monitoring
• Battery-powered equipment needing under-voltage protection
• Embedded systems utilizing CMOS logic interfaces
• Industrial control circuits operating in wide temperature ranges

Procurement Notes

Verify the specific ordering suffix TR for tape-and-reel packaging configuration. Confirm the VSOF5 package dimensions match the target PCB footprint. Ensure the 4.3V detection threshold aligns with system requirements. Check RoHS compliance status if restricted substances are mandated. Validate the last time buy status against production lifecycle needs.

Selection Notes

Choose this component for applications requiring precise voltage monitoring with customizable reset delays. The CMOS output simplifies interface design compared to open-drain alternatives. Consider the low static current for energy-efficient designs. Verify that the adjustable delay feature meets timing constraints. Ensure the operating temperature range covers the intended environment.

Part Context

This part belongs to the BU42(43)xxFVE series of voltage detectors. It shares architectural similarities with other models in the family but differs in detection threshold and package type. The FVE designation indicates the VSOF5 surface-mount package. It serves as a supervisory circuit for maintaining system stability during power fluctuations.

Replacement Considerations

BD5243G-1 is a recommended replacement with the same pinout and similar detection level. Note the package difference: BD5243G-1 uses SSOP5 while BU4343FVE uses VSOF5. Verify electrical parameter compatibility before substitution.