BU4219FVE-TR

Overview

The BU4219FVE-TR is a voltage detector IC from ROHM Semiconductor, designed for monitoring single-channel power supply voltages. It features an open-drain output and supports a reset active voltage range of 0.7 V to 7 V. The typical under-voltage detection threshold is 1.9 V with a precision of ±1%. The device includes an adjustable delay timer and operates within a temperature range of -40°C to +125°C. It is housed in a VSOF-5 package.

Feature Summary

• Provides low-voltage detection with an adjustable delay timer for customized reset timing.
• Features an open-drain output suitable for interfacing with various logic families.
• Operates across a wide industrial temperature range from -40°C to +125°C.

Applications

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

Procurement Notes

Verify the specific version suffix and packaging configuration against the official datasheet before ordering. Confirm that the VSOF-5 package dimensions align with your PCB footprint requirements. Check current supply status as this component may be subject to end-of-life restrictions or last-time-buy conditions.

Selection Notes

Select this component when a precise 1.9 V detection threshold is required for single-supervision applications. Ensure the design accommodates the adjustable delay timer external components. Verify that the open-drain output capability meets the pull-up requirements of the connected circuitry.

Part Context

This part belongs to the BU42xxFVE series of voltage detectors. It is functionally similar to other parts in the family but distinguished by its specific 1.9 V detection threshold and VSOF-5 package format. It serves as a dedicated supervisory solution for low-voltage systems.

Replacement Considerations

BD5219G-1TR is listed as a same-pinout replacement option. Verify compatibility regarding package type (SSOP5 vs VSOF-5) and electrical parameter differences such as hysteresis and output current capabilities.

FAQ

What is the reset active state of the BU4219FVE-TR?

The reset signal is active low.

Does the BU4219FVE-TR include a manual reset function?

No, this device does not support manual reset.