BU4248F-TR

Overview

The BU4248F-TR is a voltage detector with an adjustable delay time, manufactured by ROHM Semiconductor. It features a typical under-voltage detection voltage of 4.8V with a precision of ±1%. The reset active voltage range spans from 0.7V to 7V, utilizing an open-drain output type. The device supports an adjustable delay timer and maintains a low reset active state. Operating current is specified at 0.40μA (ON) and 0.55μA (OFF) at VDET=4.8V. Hysteresis is set at VDET x 0.05. Output currents are 3.3mA (Low Vol) and 6.5mA (High Vol). The internal delay circuit resistance is 10.0MΩ. It operates within a temperature range of -40°C to 125°C in an SOP4 package.

Feature Summary

• Adjustable delay timer functionality for customized reset timing
• Open-drain output configuration supporting wide voltage ranges
• High precision voltage detection with defined hysteresis characteristics

Applications

• Power supply monitoring systems requiring precise threshold detection
• Microcontroller reset circuits with configurable delay requirements
• Embedded systems needing reliable under-voltage protection

Procurement Notes

Verify the specific ordering suffix and package variant against official ROHM documentation before procurement. Confirm that the component status aligns with project lifecycle requirements, as availability may be restricted. Ensure compatibility with existing board layouts and thermal management specifications. Cross-reference datasheet revisions to guarantee parameter consistency. Validate RoHS compliance status through certified manufacturer declarations.

Selection Notes

Select this component when adjustable delay timing is critical for system stability. Consider the open-drain output capability for interfacing with various logic levels. Evaluate the operating temperature range against environmental conditions. Compare power consumption metrics with alternative detectors if energy efficiency is a primary constraint. Verify package dimensions fit within mechanical constraints.

Part Context

This part belongs to the BU42xxF series of voltage detectors from ROHM Semiconductor. It is designed for general-purpose power supply supervision. The series offers various detection voltages and package options. The BU4248F-TR specifically targets applications requiring a 4.8V threshold with flexible delay settings. It complements other parts in the family offering fixed delays or different packages.

Replacement Considerations

The BD5248G-1 is identified as a replacement with the same pinout. Verify electrical parameter compatibility, particularly regarding output current capabilities and operating temperature ranges. Check package differences between SOP4 and SSOP5 for mechanical fit.