BU4327FVE-TR

Overview

The BU4327FVE-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-channel supply voltages. It operates within a maximum supply voltage of 7 V and features an adjustable reset delay timer to prevent false triggering during power-up or transient events. The device provides a low-active output signal when the monitored voltage drops below the threshold. Key electrical parameters include a typical under-voltage detection voltage of 2.7 V with ±1% precision, a reset active voltage range from 0.7 V to 7 V, and a circuit current of 0.40 μA at VDET=4.8V. It supports an operating temperature range from -40°C to +125°C and is housed in a VSOF5 package.

Feature Summary

• CMOS output structure providing low-active reset signaling
• Adjustable reset delay timer functionality for noise immunity
• Wide reset active voltage range supporting various logic levels
• Low power consumption suitable for battery-operated systems

Applications

• Portable electronic devices requiring low standby current
• Microprocessor system power supply supervision
• Battery-powered equipment with voltage monitoring needs
• Industrial control systems operating in wide temperature ranges

Procurement Notes

Verify component authenticity through authorized distributors as the part status is listed as Last Time Buy. Confirm package integrity and RoHS compliance upon receipt. Cross-reference ordering numbers with official ROHM documentation to ensure correct revision matching. Check for obsolescence notices before finalizing procurement plans due to limited future availability.

Selection Notes

Select this component when a CMOS output interface and adjustable delay are required for voltage supervision. Compare against BD5227G-1 if SSOP5 packaging or open-drain output is preferred instead. Ensure the 2.7 V threshold aligns with system requirements. Verify that the VSOF5 package dimensions fit the PCB layout constraints. Consider the ±1% accuracy specification for precise monitoring applications.

Part Context

This component belongs to the BU42(43)xxFVE series of voltage detectors from ROHM Semiconductor. It shares functional similarities with other parts in the family but differs in specific threshold voltages and package options. The series is designed for general-purpose power management in consumer and industrial electronics, offering compact solutions for system reliability.

Replacement Considerations

BD5227G-1 is documented as a recommended replacement with similar specifications and same pinout compatibility.