BU4811F-TR

Supervisors Overview

The BU4811F-TR is a standard voltage detector manufactured by ROHM Semiconductor, designed for monitoring power supply voltages. It features an open-drain output and operates within a reset active voltage range of 0.7 V to 7 V. The typical under-voltage detection threshold is 1.1 V with a precision of ±1%. The device consumes 0.40 μA in the ON state and 0.55 μA in the OFF state at VDET=4.8V. It includes hysteresis equal to VDET x 0.05 and supports a temperature range from -40°C to 125°C. Packaged in SOP-4, it is supplied in tape-and-reel quantities of 3000 units.

Supervisors Feature Summary

• Provides precise under-voltage detection with high accuracy for reliable system supervision
• Features low power consumption suitable for battery-operated applications
• Includes built-in hysteresis to prevent output oscillation during voltage transitions

Supervisors Applications

• Portable electronic devices requiring low standby current
• Battery-powered systems needing voltage level monitoring
• General-purpose supervisory circuits in consumer electronics

Supervisors Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for obsolescence notices as this part may be subject to discontinuation. Ensure packaging specifications match design requirements for surface-mount assembly processes.

Supervisors Selection Notes

Select this component when a fixed 1.1 V detection threshold is required. Consider the SOP-4 package constraints and open-drain output compatibility with downstream logic levels. Evaluate power budget against the specified operating currents to ensure efficiency meets system targets.

Supervisors Part Context

This component belongs to the BU4811 series of standard voltage detectors. It serves as a specific variant within ROHM's portfolio of power management ICs focused on simple reset generation and voltage monitoring functions without additional complexity like watchdog timers or manual resets.

Supervisors Replacement Considerations

BD5211G-1 is listed as a similar specification replacement option.