BU4815F-TR

Supervisors Overview

The BU4815F-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 1.5 V with a precision of ±1%. The device consumes a circuit current of 0.40 μA when on and 0.55 μA when off at Vdet=4.8V. It includes hysteresis voltage defined as Vdet x 0.05. The component is supplied in SOP-4 packaging and supports RoHS compliance.

Supervisors Feature Summary

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

Supervisors Applications

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

Supervisors Procurement Notes

Verify the specific suffix 'TR' indicates tape-and-reel packaging configuration. Confirm the exact threshold voltage variant matches the design requirement, as the base part number may correspond to multiple detection levels. Check for end-of-life status or last-time-buy notices from the manufacturer before finalizing procurement plans.

Supervisors Selection Notes

Select this component when a fixed 1.5 V detection threshold is required in a compact SOP-4 package. Ensure the application does not require manual reset or watchdog timer functions, as these are absent. Verify that the open-drain output interface is compatible with the downstream logic levels and pull-up requirements of the target circuit design.

Supervisors Part Context

This part belongs to the BU48xx series of standard voltage detectors from ROHM. It is distinct from the BU4815G variant which uses SSOP-5 packaging. The F-series typically denotes SOP-4 packages. This specific model is identified as a standard voltage detector with no additional timing or reset features integrated into the silicon.

Supervisors Replacement Considerations

The BD5215G-1 is listed as a similar level replacement with identical specifications but different packaging (SSOP-5). Direct pin-to-pin substitution is not possible due to the package difference between SOP-4 and SSOP-5.