BU4243FVE-TR

Overview

The BU4243FVE-TR is a voltage detector IC from ROHM Semiconductor, designed for monitoring single-input power supply voltages. It operates within a supply voltage range of 0.7 V to 7 V and features an adjustable reset delay timer. The device utilizes a VSOF-5 surface-mount package and provides an open-drain output type. It maintains a detection voltage precision of ±1% with a typical under-voltage detection threshold of 4.3 V. The circuit draws a maximum operating current of 0.55 μA at Vdet=4.8V and functions reliably across a temperature range of -40°C to +125°C.

Feature Summary

• Integrates an adjustable reset delay timer for customized timing control
• Provides high-precision voltage detection with ±1% accuracy
• Supports low-power operation with minimal standby current consumption

Applications

• Portable electronic devices requiring low standby current
• Battery-powered systems needing reliable voltage supervision
• Industrial equipment operating in extended temperature environments

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to end-of-life status. Confirm RoHS compliance and package integrity upon receipt. Cross-reference datasheet specifications against actual received units to ensure functional equivalence for existing designs.

Selection Notes

Select this component when an adjustable delay timer is required alongside precise voltage monitoring. Ensure the VSOF-5 package fits the PCB layout constraints. Verify that the 4.3 V threshold aligns with the system's critical voltage levels and that the open-drain output interface matches the downstream logic requirements.

Part Context

This part belongs to the BU42xx series of voltage detectors from ROHM Semiconductor. It shares pinout compatibility with other variants in the family, facilitating design upgrades or replacements within existing hardware architectures without significant board modifications.

Replacement Considerations

BD5243G-1 is a recommended replacement with similar pinout and package characteristics. Verify electrical parameter alignment before implementation.