BU4811FVE-TR

Supervisors Overview

The BU4811FVE-TR is a standard voltage detector manufactured by ROHM Semiconductor, designed for monitoring power supply voltages. It features an under-voltage detection threshold of 1.1V with a precision of ±1%. The device operates within a reset active voltage range of 0.7V to 7V and utilizes an open-drain 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 a VSOF5 package measuring 1.6x1.6mm with a thickness of 0.6mm.

Supervisors Feature Summary

• Provides precise under-voltage detection with high accuracy and defined hysteresis to prevent output fluctuation.

Supervisors Applications

• Power supply supervision in electronic systems
• Monitoring battery voltage levels
• Reset signal generation for microcontrollers

Supervisors Procurement Notes

Verify the obsolete status and last-time-buy availability before procurement planning. Confirm that the VSOF5 package dimensions match the target PCB footprint. Ensure compatibility with the required operating temperature range and voltage thresholds for the specific application environment.

Supervisors Selection Notes

Select this component when a fixed 1.1V detection threshold with open-drain output is required. Consider the low standby current for battery-operated devices. Verify that the VSOF5 package size fits the design constraints compared to alternative packages like SSOP5.

Supervisors Part Context

This part belongs to the BU48xx series of standard voltage detectors from ROHM. It is functionally similar to the BD5211G-1 but differs in package type (VSOF5 vs SSOP5) and output configuration. The series is designed for general-purpose voltage monitoring applications requiring compact packaging.

Supervisors Replacement Considerations

The BD5211G-1 is listed as a recommended replacement with similar specifications. Note differences in package type (SSOP5) and potential variations in delay timer functionality. Verify pinout compatibility and thermal performance when substituting.