BU4822F-TR

Supervisors Overview

The BU4822F-TR is a single-channel CMOS voltage detector manufactured by Rohm Semiconductor. It features an open-drain output and provides a low-active reset signal when the monitored supply voltage drops below the 2.2V threshold. The device operates within a supply voltage range of 0.7V to 7V and includes a hysteresis voltage defined as Vdet multiplied by 0.05. It is housed in a compact 4-SOP (SC-82) package, suitable for surface-mount installation, and supports an operating temperature range from -40°C to +125°C.

Supervisors Feature Summary

• Provides simple power-on reset functionality with a fixed detection threshold.
• Features an open-drain output interface compatible with various logic families.
• Incorporates internal hysteresis to prevent output oscillation during voltage transitions.

Supervisors Applications

• Microcontroller system supervision
• Battery-powered device monitoring
• Portable electronic equipment power management

Supervisors Procurement Notes

Verify component authenticity through authorized distributors due to end-of-life status. Confirm package integrity and pin alignment against the SC-82 specification. Check RoHS compliance documentation for regulatory adherence. Validate replacement options if new production is required.

Supervisors Selection Notes

Select this component for applications requiring a fixed 2.2V under-voltage detection point. Ensure the design accommodates the open-drain output configuration with appropriate pull-up resistors. Consider the limited thermal performance of the 4-SOP package for high-power environments.

Supervisors Part Context

This part belongs to the BU4822 series of standard voltage detectors. It serves as a basic supervisory circuit for maintaining system stability during power fluctuations. The TR suffix indicates tape-and-reel packaging for automated assembly processes.

Supervisors Replacement Considerations

BD5222G-1TR is listed as a similar specification replacement by Rohm Semiconductor.