BU4328FVE-TR

Overview

The BU4328FVE-TR is a CMOS voltage detector IC from ROHM Semiconductor, designed for monitoring power supply voltages with high accuracy. It features an adjustable delay time circuit and operates within a wide temperature range of -40°C to +125°C. The device provides a low-active reset output and supports detection voltages in 0.1V increments. Key electrical parameters include a typical detection voltage of 2.8V, ±1% precision, and ultra-low current consumption of approximately 0.55µA. It is housed in a compact VSOF5 package.

Feature Summary

• Adjustable delay time circuit allows customization of reset timing without external components.
• High detection voltage accuracy of ±1% ensures reliable system supervision.
• Ultra-low current consumption minimizes power drain in battery-operated applications.
• CMOS output structure supports direct interfacing with digital logic circuits.

Applications

• Portable electronic devices requiring low-power voltage supervision
• Battery-powered systems needing precise under-voltage detection
• Industrial control units operating in extended temperature environments

Procurement Notes

Verify the specific suffix and tape-and-reel configuration against official ROHM documentation before procurement. Confirm that the VSOF5 package dimensions match your PCB footprint requirements. Check for any end-of-life notices or last-time-buy statuses associated with this part number to ensure long-term supply availability.

Selection Notes

Select this component when a fixed detection voltage around 2.8V is required with adjustable reset delay. Compare current consumption and output drive capabilities against alternatives if system power budgets are tight. Ensure the operating temperature range meets your application's environmental conditions.

Part Context

This part belongs to the BU43xx series of CMOS voltage detectors, which offer adjustable delay times and high accuracy. The series is characterized by low current consumption and a wide operating voltage range, making it suitable for various supervisory applications in consumer and industrial electronics.

Replacement Considerations

BD5228G-1TR is a recommended replacement with similar pinout and detection voltage characteristics. Verify package compatibility as BD5228G-1TR uses SSOP5 instead of VSOF5. Check output type differences, as BD5228G-1TR features an open-drain output compared to the CMOS output of BU4328FVE.

FAQ

What is the typical detection voltage for the BU4328FVE?

The typical detection voltage is 2.8V, with a precision of ±1%.

Does the BU4328FVE support manual reset functionality?

No, the BU4328FVE does not have a manual reset input; it relies on automatic power-on reset and under-voltage detection.

What is the maximum operating voltage for this device?

The maximum operating voltage is 7V, allowing it to monitor standard 3.3V and 5V power rails effectively.