BU4218FVE-TR

Overview

The BU4218FVE-TR is a voltage detector from ROHM Semiconductor, designed for monitoring single input voltages. It features an open-drain output and adjustable reset delay time without manual reset or watchdog capabilities. The device operates within a supply voltage range of 0.7 V to 7 V, with a typical under-voltage detection threshold of 1.8 V and precision of ±1%. It supports a maximum power dissipation of 210 mW and functions across a temperature range of -40°C to 125°C. The circuit current is specified at 0.40 μA (ON) and 0.55 μA (OFF) at VDET=4.8V, housed in a VSOF5 package.

Feature Summary

• Provides simple reset or power-on reset functionality with low active state output.
• Features adjustable reset delay timer for customizable timing control.
• Includes hysteresis voltage set at VDET x 0.05 for noise immunity.

Applications

• Microprocessor system supervision
• Portable equipment power management
• Battery-operated device monitoring

Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm RoHS compliance and check for alternative sourcing options as distribution may be limited. Ensure storage conditions meet moisture sensitivity level requirements before assembly.

Selection Notes

Select this component for applications requiring precise voltage monitoring with adjustable delay characteristics. Consider the open-drain output compatibility with system logic levels. Evaluate thermal performance against the 210 mW dissipation limit in enclosed designs.

Part Context

Part of the BU42xx series voltage detectors, offering low-power supervision solutions. Designed for surface-mount installation in compact electronic systems requiring reliable power management and reset signal generation.

Replacement Considerations

BD5218G-1TR is a recommended replacement with same pinout configuration. Verify package differences between VSOF5 and SSOP5 during integration planning.