BU4231F-TR

Overview

The BU4231F-TR is a voltage detector with an adjustable delay time, manufactured by ROHM Semiconductor. It features a typical under-voltage detection voltage of 3.1V with ±1% precision. The reset active voltage range spans from 0.7V to 7V. It utilizes an open-drain output type and provides an adjustable reset delay timer. The circuit current is 0.40μA (ON) and 0.55μA (OFF) at VDET=4.8V. Hysteresis voltage is defined as VDET x 0.05. The L output current is 3.3mA (LowVol) and 6.5mA (HighVol). The delay circuit resistance is 10.0MΩ. Operating temperature ranges from -40°C to 125°C. It is housed in a VSOF5 package measuring 1.6x1.6mm with a thickness of 0.6mm.

Feature Summary

• Adjustable delay timer functionality for customized reset timing
• Open-drain output configuration supporting flexible interfacing
• Wide reset active voltage range accommodating various supply levels

Applications

• Power supply monitoring circuits
• Microcontroller system supervision
• Battery-operated device protection

Procurement Notes

Verify the specific suffix and tape/reel specifications against the official datasheet before procurement. Confirm that the VSOF5 package dimensions align with your PCB footprint requirements. Ensure compatibility with the operating temperature range specified for your application environment. Check for any end-of-life notices or last-time-buy statuses associated with this part number.

Selection Notes

Select this component when an adjustable delay timer is required alongside precise under-voltage detection. The open-drain output allows for easy integration with various logic families. Consider the low circuit current consumption for battery-sensitive applications. Verify that the 3.1V detection threshold meets the system's power management needs.

Part Context

This part belongs to the BU42xx series of voltage detectors from ROHM Semiconductor. It is designed for power supply support functions in electronic systems. The series offers various detection voltages and package options to suit different design constraints. The BU4231F-TR specifically targets applications requiring adjustable reset delays.

Replacement Considerations

The BD5231G-1 is listed as a similar level replacement with the same pinout. Verify electrical parameter compatibility, particularly the hysteresis voltage and output current specifications, before substituting.