BU4322FVE-TR

Overview

The BU4322FVE-TR is a voltage detector with an adjustable delay time, manufactured by ROHM Semiconductor. It features a typical under-voltage detection voltage of 2.2V with ±1% precision. The reset active voltage range spans from 0.7V to 7V. The device utilizes a CMOS output type and includes an adjustable delay timer without manual reset or watchdog timer capabilities. It is not designated for automotive use. The circuit current is 0.40μA (ON) and 0.55μA (OFF) at VDET=4.8V. Hysteresis voltage is defined as VDET x 0.05. The L output currents are 3.3mA (LowVol) and 6.5mA (HighVol). The delay circuit resistance is 10.0MΩ. Operating temperature ranges from -40°C to 125°C. The package is VSOF5.

Feature Summary

• Adjustable delay timer functionality
• CMOS output type
• Wide reset active voltage range
• Low power consumption

Applications

• Power supply monitoring
• Microprocessor reset circuits
• Battery backup systems

Procurement Notes

Verify the specific ordering suffix and package variant when sourcing. Confirm RoHS compliance status through official documentation. Check supply status as this component may be subject to end-of-life notices. Ensure compatibility with existing PCB footprints and design specifications before procurement.

Selection Notes

Select based on required detection voltage and delay timing needs. Consider the CMOS output drive capability for load requirements. Evaluate operating temperature range against environmental conditions. Compare with similar pinout alternatives if availability is constrained.

Part Context

This component belongs to the BU43xx series of voltage detectors from ROHM Semiconductor. It is designed for low-voltage detection applications requiring precise threshold monitoring and configurable reset delays. The VSOF5 package offers a compact form factor suitable for space-constrained designs.

Replacement Considerations

BD5222G-1 is listed as a recommended replacement with the same pinout.