BU4825F-TR

Supervisors Overview

The BU4825F-TR is a standard voltage detector IC manufactured by Rohm Semiconductor, designed for monitoring power supply voltages. It features a typical under-voltage detection threshold of 2.5V with a precision of ±1%. The reset active voltage range spans from 0.7V to 7V, utilizing an open-drain output type that activates in a low state. The device operates within a temperature range of -40°C to 125°C and consumes a circuit current of 0.40μA when on (at VDET=4.8V) and 0.55μA when off. It includes hysteresis voltage defined as VDET x 0.05 and lacks manual reset, watchdog timer, or automotive certification. Packaged in SOP4 format.

Supervisors Feature Summary

• Provides precise under-voltage detection with a fixed 2.5V threshold and ±1% accuracy.
• Features an open-drain output capable of driving external pull-up resistors for logic interfacing.
• Operates across a wide input voltage range from 0.7V to 7V for versatile power monitoring.
• Maintains ultra-low current consumption suitable for battery-powered applications.

Supervisors Applications

• Monitoring microcontroller power supplies for brown-out protection
• Ensuring stable operation in portable electronic devices
• Providing reset signals for digital logic circuits during power transitions

Supervisors Procurement Notes

Verify the specific ordering suffix and package variant when sourcing, as the BU4825F-TR designation indicates tape-and-reel packaging. Confirm RoHS compliance status and check for end-of-life notices, as this component may be restricted for new designs. Ensure compatibility with existing PCB footprints and verify that the open-drain output configuration aligns with the target system's logic level requirements before procurement.

Supervisors Selection Notes

Select the BU4825F-TR when a fixed 2.5V detection threshold is required without adjustable delay or manual reset functionality. Consider its low quiescent current for energy-sensitive applications. Evaluate the SOP4 package size against board space constraints. Compare performance metrics such as hysteresis and output drive capability against alternative detectors if higher precision or different voltage thresholds are needed for the specific application design.

Supervisors Part Context

This component belongs to Rohm's standard voltage detector family, specifically engineered for simple reset generation. It complements other models like the BU4825G series by offering similar electrical characteristics but in a different package configuration. The BU4825 series focuses on basic power supervision tasks, providing reliable monitoring without complex timing features, making it suitable for straightforward embedded systems requiring robust power integrity management.

Supervisors Replacement Considerations

The BD5225G-1 is identified as a similar specification replacement with the same package type. Verify pinout compatibility and ensure the slightly different reset active voltage range (0.8V to 6V vs 0.7V to 7V) does not impact system margins. Confirm that the BD5225G-1's recommended status aligns with long-term availability needs compared to the potentially discontinued BU4825F-TR.