BU4940F-TR

Supervisors Overview

The BU4940F-TR is a standard voltage detector manufactured by ROHM Semiconductor, designed for monitoring power supply voltages. It features a typical under-voltage detection threshold of 4.0V with a precision of ±1%. The device operates within a reset active voltage range of 0.7V to 7V and utilizes a CMOS output type. Key electrical characteristics include a circuit current of 0.40μA in the ON state and 0.55μA in the OFF state at VDET=4.8V. Hysteresis is set at VDET x 0.05. The component supports an operating temperature range from -40°C to 125°C and is housed in an SOP4 package.

Supervisors Feature Summary

• CMOS output structure providing low power consumption
• High precision voltage detection with ±1% accuracy
• Wide operating voltage range supporting various system requirements

Supervisors Applications

• Power supply supervision in electronic equipment
• Microprocessor reset circuits
• Battery voltage monitoring systems

Supervisors Procurement Notes

Verify the specific suffix and packaging details against official ROHM documentation before procurement. Confirm that the BU4940F-TR meets all environmental and regulatory compliance requirements for your intended application. Ensure compatibility with existing board layouts and thermal management strategies. Cross-reference the latest datasheet for any updates on recommended replacement parts or design-in guidelines.

Supervisors Selection Notes

Select this component when a precise 4.0V detection threshold is required with minimal quiescent current. The CMOS output is suitable for direct interfacing with digital logic inputs. Consider the wide operating temperature range for applications exposed to varying environmental conditions. Verify that the SOP4 package fits the available PCB space constraints.

Supervisors Part Context

This part belongs to the BU49xx series of standard voltage detectors from ROHM Semiconductor. These devices are engineered for reliable performance in consumer and industrial electronics. The series offers various detection voltages to accommodate different system architectures. The BU4940F-TR specifically targets applications requiring accurate low-voltage monitoring with compact packaging solutions.

Supervisors Replacement Considerations

BD5240G-1 is listed as a similar specification replacement option.