BU4330F-TR

Overview

The BU4330F-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 supply voltage range of 0.7 V to 7 V. The device detects under-voltage conditions with a typical threshold of 3.0 V and offers high precision accuracy of ±1%. It consumes a low operating current of 550 nA and supports an extended industrial temperature range from -40°C to +125°C. The component is housed in a compact SOP-4 surface-mount package.

Feature Summary

• CMOS architecture ensures ultra-low power consumption suitable for battery-operated systems
• Adjustable reset delay timer allows customizable timing response via external components
• High detection accuracy of ±1% ensures reliable voltage monitoring across the operating range

Applications

• Portable electronic devices requiring low standby current
• Microprocessor system reset circuits
• Battery-powered equipment voltage supervision

Procurement Notes

Verify the obsolete status and last-time-buy availability before finalizing designs. Confirm that the SOP-4 package and 3.0 V threshold meet specific circuit requirements. Check for recommended alternatives like the BU4330G-TR if long-term supply stability is critical for production planning.

Selection Notes

Select this component when a fixed 3.0 V threshold with high precision is required alongside adjustable delay functionality. The low 550 nA quiescent current makes it suitable for energy-efficient applications. Ensure the design accommodates the SOP-4 footprint and operates within the specified -40°C to +125°C temperature limits.

Part Context

This part belongs to the BU42(43)xxF series of supervisory circuits from ROHM Semiconductor. It is specifically engineered for low-voltage detection with adjustable timing characteristics. The product line focuses on providing precise monitoring solutions with minimal power impact for portable and industrial electronics.

Replacement Considerations

The BU4330G-TR is listed as a recommended alternative with similar electrical specifications but utilizes an SSOP-5 package. Designers must account for pinout differences and package dimension changes during migration.