BU4825G-TR

Supervisors Overview

The BU4825G-TR is a single-channel CMOS voltage detector manufactured by Rohm Semiconductor, designed for simple reset and power-on reset applications. It features an open-drain output with low-active reset signaling. The device monitors a supply voltage threshold of 2.5V with a precision of ±1%. It operates within a supply voltage range of 0.7V to 7V and supports a wide operating temperature range from -40°C to +125°C. Hysteresis is set at VDET x 0.05. The component is housed in a 5-SSOP (SC-74A) surface-mount package.

Supervisors Feature Summary

• Provides reliable system reset via open-drain output when monitored voltage drops below the specified threshold.
• Operates effectively across a broad industrial temperature range without requiring external components.
• Features built-in hysteresis to prevent output oscillation during slow-rising power supply voltages.

Supervisors Applications

• Microcontroller power supply monitoring
• Battery-powered device voltage supervision
• Embedded system reset circuitry

Supervisors Procurement Notes

Verify that the specific order quantity aligns with the manufacturer's standard packing unit of 3,000 units per reel, as this is a tape-and-reel product. Confirm compliance with RoHS3 standards if required by your assembly process. Note that the component status is Not Recommended for New Designs; ensure existing inventory suffices for production needs or plan for alternative sourcing strategies immediately.

Supervisors Selection Notes

Select this component only if a fixed 2.5V detection threshold meets the design requirements, as the threshold is not adjustable. Ensure the application does not require manual reset functionality or a watchdog timer, as these features are absent. Verify that the open-drain output configuration is compatible with the downstream logic levels and pull-up resistor requirements of the target microcontroller or system interface.

Supervisors Part Context

This part belongs to the BU4825 series of standard voltage detectors. It is functionally similar to the BD5225G-1 but lacks adjustable delay features. The BU4825G-TR is intended for legacy support rather than new development, serving as a drop-in replacement for older designs requiring basic undervoltage detection in compact surface-mount packages.

Supervisors Replacement Considerations

The BD5225G-1TR is documented as a recommended replacement with the same SSOP5 package and 2.5V threshold. It offers improved current consumption metrics and adjustable delay capabilities, though it has a lower maximum operating temperature of 85°C compared to the BU4825G-TR's 125°C limit.