BU4237G-TR

Overview

The BU4237G-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-input power supply lines. It operates within a supply voltage range of 0.7 V to 7 V and features an adjustable reset delay timer. The device provides a threshold detection voltage of 3.7 V with a precision of ±1%. It utilizes an open-drain output type and maintains a low operating current of 0.40 μA at the detection voltage. The component is housed in an SSOP-5 package and supports an extended industrial temperature range from -40°C to +125°C.

Feature Summary

• Adjustable reset delay timer functionality
• Open-drain output configuration
• Low power consumption design

Applications

• Portable equipment power management
• Microprocessor system supervision
• Battery-powered device monitoring

Procurement Notes

Verify the supply status carefully as this component is marked Not Recommended for New Designs (NRND). Confirm that existing inventory meets long-term production requirements. Check for RoHS compliance details in the official datasheet. Ensure the SSOP-5 package matches your PCB footprint constraints before finalizing procurement decisions.

Selection Notes

Select this part when a fixed 3.7 V threshold with adjustable timing is required. Consider the BD5237G-1 as a recommended alternative if new design support is necessary. Evaluate the open-drain output compatibility with downstream logic levels. Verify that the 0.7 V minimum operating voltage suits the lowest expected supply rail conditions.

Part Context

This component belongs to the BU42(43)xxG series of voltage detectors. It shares pinout and functional similarities with other members of the family, differing primarily in detection thresholds. The BU4237G-TR specifically targets applications requiring precise low-voltage monitoring with customizable reset delays for system stability.

Replacement Considerations

The BD5237G-1 is a recommended replacement with the same pinout and package. It offers similar electrical characteristics but is designated for new designs. Verify that the slight differences in reset active voltage range do not impact circuit performance.