BU4837G-TR

Supervisors Overview

The BU4837G-TR is a CMOS voltage detector from ROHM Semiconductor, designed for monitoring single power supply lines. It features a fixed detection threshold of 3.7 V with ±1% accuracy. The device operates within a supply voltage range of 0.7 V to 7 V and supports an extended temperature range from -40°C to +125°C. It utilizes an open-drain output configuration without manual reset or watchdog timer functions. The component is housed in a compact SSOP-5 package.

Supervisors Feature Summary

• Ultra-low current consumption for battery-powered applications
• High-accuracy voltage detection with ±1% precision
• Wide operating temperature range suitable for industrial environments

Supervisors Applications

• Portable electronic devices requiring low standby current
• Industrial control systems needing reliable voltage supervision
• Consumer electronics with strict power management requirements

Supervisors Procurement Notes

Verify the Not Recommended for New Designs (NRND) status before procurement. Confirm availability through authorized distributors as production may be limited. Ensure compatibility with existing PCB layouts using the SSOP-5 package. Check RoHS compliance documentation for regulatory adherence. Validate replacement options if long-term supply assurance is required.

Supervisors Selection Notes

Select this component when a fixed 3.7 V threshold is required with high precision. Consider the open-drain output for interfacing with various logic levels. Evaluate the low current consumption against system power budgets. Verify that the absence of reset delay or watchdog functions aligns with application timing needs. Ensure the operating voltage range covers the minimum and maximum supply variations.

Supervisors Part Context

This part belongs to the BU48xx series of standard CMOS reset ICs. The series offers detection voltages from 0.9 V to 4.8 V in 0.1 V steps. It provides both Nch open drain and CMOS output types. The BU4837G-TR specifically targets applications requiring precise voltage monitoring with minimal power draw.

Supervisors Replacement Considerations

BD5237G-1 is a recommended replacement with the same SSOP-5 package and 3.7 V detection voltage. Note differences in reset delay timer adjustability and output current capabilities between the two parts.