BU4840FVE-TR

Supervisors Overview

The BU4840FVE-TR is a CMOS voltage detector IC from Rohm Semiconductor, designed for supervisory circuit applications. It features a fixed detection threshold of 4V with an accuracy of ±1%. The device operates within a supply voltage range of 0.7V to 7V and supports a wide operating temperature range from -40°C to +125°C. It utilizes a 5-VSOF (SOT-665) surface-mount package. Key electrical characteristics include a typical operating current of 0.40μA at Vdet=4.8V and a standby current of 0.55μA. The output type is open drain with low-active reset state.

Supervisors Feature Summary

• CMOS technology ensures ultra-low power consumption suitable for battery-operated systems.
• Fixed 4V detection threshold provides precise under-voltage monitoring without external components.
• Open-drain output allows flexible interfacing with various logic families.

Supervisors Applications

• Portable electronic devices requiring low standby current
• Battery-powered equipment needing reliable power-fail detection
• Embedded systems utilizing simple reset or power-on reset functions

Supervisors Procurement Notes

Verify component authenticity through authorized distributors as the part status is End-of-Life. Confirm package integrity and RoHS compliance against the official datasheet. Check for moisture sensitivity level requirements during storage and handling. Ensure design-in compatibility with replacement parts if sourcing new production units.

Supervisors Selection Notes

Select this component for applications requiring a fixed 4V threshold in a compact 5-VSOF package. Consider the low operating current for energy-sensitive designs. Verify that the open-drain output configuration meets system logic requirements. Evaluate thermal performance within the specified -40°C to +125°C range.

Supervisors Part Context

This component belongs to the BU4840 series of standard voltage detectors manufactured by Rohm Semiconductor. It is part of a family of supervisory circuits designed for simple reset and power-on reset functions. The series includes variants with different packages and thresholds, such as BU4840F and BU4840G.

Supervisors Replacement Considerations

BD5240G-1 is a confirmed substitute with similar specifications including a 4.0V threshold and open-drain output. Verify pinout compatibility and package dimensions before implementation.