BU4941F-TR

Supervisors Overview

The BU4941F-TR is a CMOS voltage detector IC from ROHM Semiconductor, designed for monitoring single-input power supply lines. It operates within a maximum supply voltage of 7 V and features a fixed threshold detection voltage of 4.1 V with an overvoltage threshold of 4.141 V. The device offers high accuracy of 1% and ultra-low static current consumption of 500 nA. It utilizes an SOP-4 surface-mount package and supports an operating temperature range from -40°C to +125°C. The output type is CMOS, and it lacks manual reset, watchdog timer, or chip enable functions.

Supervisors Feature Summary

• CMOS output interface for direct logic integration
• High-accuracy voltage detection with 1% precision
• Ultra-low current consumption for battery efficiency
• Wide industrial temperature operation capability

Supervisors Applications

• Portable electronic devices requiring low standby current
• Microprocessor system reset circuits
• Battery-powered equipment voltage monitoring
• General-purpose supervisory circuits in consumer electronics

Supervisors Procurement Notes

Verify component authenticity through authorized distributors as the part status is listed as obsolete. Confirm package integrity and pin alignment against the SOP-4 specification before integration. Review the official datasheet for handling precautions and storage conditions to ensure reliability during assembly processes.

Supervisors Selection Notes

Select this component when a fixed 4.1 V threshold is required without adjustable delay or manual reset functionality. Consider the CMOS output drive capability and low quiescent current for power-sensitive designs. Ensure the SOP-4 footprint matches the PCB layout constraints and that the operating environment stays within the specified thermal limits.

Supervisors Part Context

This part belongs to the BU49xx series of standard CMOS voltage detectors, which provide various detection voltages in 0.1 V increments. The series includes both N-ch open drain and CMOS output types. The BU4941F-TR specifically targets applications needing precise under-voltage detection with minimal power draw in compact packages.

Supervisors Replacement Considerations

BD5231G-1TR is documented as a similar specification replacement, though it features an SSOP-5 package and open-drain output instead of CMOS.