BU4245FVE-TR

Overview

The BU4245FVE-TR is a voltage detector IC from ROHM Semiconductor, designed for monitoring power supply levels in electronic circuits. It features an adjustable delay timer and operates within a reset active voltage range of 0.7 to 7 V. The typical under-voltage detection voltage is 4.5 V with a precision of ±1%. The device utilizes an open-drain output type and maintains a low reset active state. Operating temperatures range from -40°C to 125°C. The circuit current is specified at 0.40 μA (ON) and 0.55 μA (OFF) at VDET=4.8V. Hysteresis voltage is defined as VDET x 0.05. The L output current capabilities are 3.3 mA (LowVol) and 6.5 mA (HighVol). The component is housed in a VSOF5 package measuring 1.6x1.6 mm with a thickness of 0.6 mm.

Feature Summary

• Provides voltage supervision with an adjustable delay timer function to manage reset timing flexibility.
• Features an open-drain output structure compatible with various logic families for system integration.
• Operates across an extended industrial temperature range suitable for diverse environmental conditions.

Applications

• Power supply monitoring in embedded systems
• Microcontroller reset circuit generation
• Battery-powered device supervision

Procurement Notes

Verify the specific ordering suffix and package variant against the official datasheet before procurement. Confirm that the VSOF5 package dimensions align with the target PCB footprint. Check for any end-of-life or last-time-buy status updates directly from the manufacturer. Ensure compatibility with the required operating temperature range and electrical specifications for the intended application environment.

Selection Notes

Select this component when an adjustable delay timer is required for reset sequencing. The open-drain output allows for flexible pull-up resistor selection. Verify that the 4.5 V detection threshold matches the monitored rail. Consider the VSOF5 package size constraints during layout design. Ensure the operating voltage range covers the minimum and maximum supply voltages expected in the system.

Part Context

This part belongs to the BU42xx series of voltage detectors manufactured by ROHM Semiconductor. These devices are designed for simple reset and power-on-reset applications. The series offers various detection voltages and package options to suit different monitoring needs. The BU4245FVE-TR specifically targets applications requiring precise voltage supervision with customizable delay characteristics.

Replacement Considerations

The BD5245G-1 is listed as a recommended replacement with the same pinout. Note that the BD5245G-1 uses an SSOP5 package, which differs physically from the VSOF5 package of the BU4245FVE-TR. Verify mechanical fit and soldering profile compatibility before substitution.