BU4222F-TR

Overview

The BU4222F-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring power supply voltages. It features an adjustable reset delay timer and an open-drain output type. The typical under-voltage detection voltage is 2.2 V with a precision of ±1%. The reset active voltage range spans from 0.7 V to 7 V. The circuit operates within a temperature range of -40°C to +125°C. In the ON state at Vdet=4.8V, the circuit current is 0.40 μA, while in the OFF state it is 0.55 μA. The device is housed in an SOP-4 package.

Feature Summary

• Adjustable reset delay timer functionality
• Open-drain output configuration
• CMOS low voltage detection technology

Applications

• Power supply monitoring systems
• Microcontroller reset circuits
• Battery backup supervision

Procurement Notes

Verify the specific suffix TR indicates tape and reel packaging when sourcing. Confirm the component status as End-of-Life or Last Time Buy through official ROHM channels prior to procurement planning. Ensure compatibility with existing SOP-4 footprints during integration.

Selection Notes

Select this component for applications requiring a fixed 2.2 V threshold with adjustable timing delays. Compare against the BD5222G-1 for potential pin-compatible alternatives if updated availability is required. Verify that the open-drain output aligns with the downstream logic interface requirements.

Part Context

This part belongs to the BU42xx series of voltage detectors from ROHM. It shares functional similarities with other models in the family but is distinguished by its specific 2.2 V detection threshold and SOP-4 package format. The series is designed for general-purpose power management supervision tasks.

Replacement Considerations

The BD5222G-1 is listed as a similar level replacement with the same pinout. Verify electrical parameter alignment and package compatibility before substitution.