BU4225G-TR

Overview

The BU4225G-TR is a CMOS voltage detector manufactured by Rohm Semiconductor, designed for supervisory circuit applications. It features a fixed under-voltage detection threshold of 2.5V with a precision of ±1%. The device operates within a supply voltage range of 0.7V to 7V and supports an adjustable reset delay timer via an external resistor. It provides a low-active open-drain output and functions across a temperature range of -40°C to +125°C. The IC consumes 0.40μA in the ON state and 0.55μA in the OFF state at VDET=4.8V. It is housed in a 5-SSOP package.

Feature Summary

• Features an adjustable reset delay timer controlled by an external resistor connected to the RESET pin.
• Provides a low-active open-drain output suitable for interfacing with various logic families.
• Includes hysteresis voltage set to VDET x 0.05 to prevent output oscillation during threshold crossing.

Applications

• Portable equipment requiring low power consumption monitoring
• Battery-operated devices needing under-voltage detection
• General-purpose electronic circuits requiring power supply supervision

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS3 compliance status as indicated in official documentation. Check for obsolete status notifications from Rohm Semiconductor prior to procurement. Ensure packaging specifications match project requirements for surface-mount assembly processes.

Selection Notes

Select this component when a fixed 2.5V threshold is required for single-channel voltage monitoring. Consider the adjustable delay feature if system startup sequencing requires specific timing control. Evaluate the low quiescent current characteristics for battery-sensitive designs. Verify that the open-drain output configuration aligns with the target microcontroller or logic interface requirements.

Part Context

This part belongs to the BU42xx series of voltage detectors from Rohm Semiconductor. It serves as a specialized power management integrated circuit (PMIC) within the broader category of supervisory circuits. The device is engineered for compact surface-mount applications, offering reliability in consumer electronics and industrial control systems where precise voltage monitoring is critical.

Replacement Considerations

The BD5225G-1 is documented as a replacement with the same pinout. Verify compatibility regarding package dimensions and electrical parameters before substitution.