BU4325F-TR

Overview

The BU4325F-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring power supply voltages. It features an adjustable delay timer and operates within a reset active voltage range of 0.7V to 7V. The typical under-voltage detection threshold is 2.5V with a precision of ±1%. The device utilizes a SOP4 package and supports a maximum operating temperature of 125°C. Circuit current consumption is specified at 0.40μA in the ON state and 0.55μA in the OFF state when VDET is 4.8V. Hysteresis is set at VDET x 0.05, and the delay circuit resistance is 10.0MΩ.

Feature Summary

• CMOS output type with low voltage detection capabilities
• Adjustable reset delay timer functionality
• High accuracy voltage detection with defined hysteresis

Applications

• Power supply monitoring systems
• Microprocessor reset circuits
• Battery backup supervision

Procurement Notes

Verify component authenticity through authorized channels as this part may be subject to obsolescence or last-time-buy status. Confirm package integrity and pinout compatibility during integration. Review official datasheets for updated electrical characteristics and handling instructions prior to procurement to ensure compliance with current manufacturing standards.

Selection Notes

Select this component for applications requiring precise voltage monitoring with customizable reset timing. The CMOS output interface ensures compatibility with standard digital logic families. Consider the wide operating temperature range and low current consumption for energy-efficient designs. Ensure the selected threshold voltage aligns with the specific system requirements for reliable operation under varying load conditions.

Part Context

This component belongs to the BU43xx series of supervisory circuits from ROHM Semiconductor. These devices are engineered for high reliability in embedded systems. The series offers various detection thresholds to accommodate different power rail specifications. Integration into compact designs is facilitated by the small outline package format suitable for surface-mount assembly processes.

Replacement Considerations

BD5225G-1TR is documented as a recommended replacement with the same pinout configuration.