BU4237F-TR

Overview

The BU4237F-TR is a voltage detector supervisory circuit manufactured by ROHM Semiconductor, housed in an SOP-4 package. It features a typical under-voltage detection threshold of 3.7 V with a precision of ±1%. The device supports a reset active voltage range from 0.7 V to 7 V and utilizes an open-drain output type. It incorporates an adjustable delay timer for reset timing control. The circuit operates within a temperature range of -40°C to +125°C. Quiescent current specifications are documented at 0.40 μA (ON) and 0.55 μA (OFF) when the detection voltage is set to 4.8 V.

Feature Summary

• Features an adjustable delay timer mechanism for customizable reset timing sequences.
• Provides high-precision voltage monitoring with a typical accuracy of ±1%.

Applications

• Monitoring power supply voltages in embedded systems
• Providing reset signals for microcontrollers during brown-out events
• Supervising battery-powered devices requiring low-voltage detection

Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm package integrity and RoHS compliance upon receipt. Cross-reference datasheet revisions to ensure parameter consistency. Validate supplier documentation against official ROHM records before integration into production designs.

Selection Notes

Select this component for applications requiring precise voltage supervision with flexible reset timing. The wide operating temperature range suits industrial environments. Ensure the open-drain output configuration aligns with system logic requirements. Consider the adjustable delay feature for noise immunity or startup sequencing needs.

Part Context

This part belongs to the BU42xxF series of voltage detectors from ROHM. It is designed for general-purpose power management supervision. The SOP-4 package offers a compact footprint suitable for space-constrained PCB layouts. The series emphasizes low power consumption and high reliability for consumer and industrial electronics.

Replacement Considerations

The BD5237G-1 is identified as a recommended replacement with the same pinout. Verify compatibility regarding package dimensions and electrical parameters before substitution.