BU4324FVE-TR

Overview

The BU4324FVE-TR is a CMOS low voltage detector manufactured by ROHM Semiconductor, designed for supervisory circuit applications. It features a fixed under-voltage detection threshold of 2.4 V with a precision accuracy of ±1%. The device operates within a supply voltage range of 0.7 V to 7 V and supports an adjustable reset delay timer. It utilizes a VSOF-5 surface-mount package and functions across an industrial temperature range from -40°C to +125°C. The component draws a typical operating current of 550 nA and provides a CMOS output type without manual reset or watchdog timer capabilities.

Feature Summary

• CMOS output interface for direct logic integration
• Adjustable reset delay timer functionality
• High accuracy voltage detection threshold
• Low power consumption design

Applications

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

Procurement Notes

This component is officially classified as obsolete and no longer in production by the manufacturer. Verification of availability should focus on surplus distributors or secondary market sources rather than standard procurement channels. Engineers must confirm the authenticity and storage history of any available units due to the end-of-life status. Design-in activities should prioritize replacement strategies immediately.

Selection Notes

Selection requires matching the specific 2.4 V detection threshold to the target system's minimum operating voltage. The adjustable delay feature allows customization via external components, necessitating careful calculation based on the application's timing requirements. The VSOF-5 package dimensions must be verified against the PCB footprint constraints. Thermal performance should be evaluated within the specified -40°C to +125°C operational range.

Part Context

The BU4324FVE-TR belongs to the BU42(43)xxFVE series of voltage detectors from ROHM Semiconductor. This family is characterized by low standby current and compact packaging suitable for space-constrained designs. The part serves as a dedicated supervisor for ensuring stable operation of digital circuits during power-up and power-down sequences.

Replacement Considerations

BD5224G-1 is a recommended replacement with the same pinout configuration.