BU4225F-TR

Overview

The BU4225F-TR is a CMOS voltage detector IC from ROHM Semiconductor, designed for supervisory circuit applications. It features an adjustable delay timer and operates within a reset active voltage range of 0.7V to 7V. The device provides high accuracy with a detection voltage precision of ±1% and includes hysteresis voltage set at VDET x 0.05. It consumes ultra-low current, typically 0.40µA in the ON state and 0.55µA in the OFF state when VDET is 4.8V. The component supports an open-drain output type and functions reliably across a temperature range of -40°C to +125°C.

Feature Summary

• Adjustable output delay time setting capability
• High accuracy detection voltage with ±1% precision
• Ultra-low power consumption suitable for battery-operated systems
• Open-drain output configuration for flexible interfacing

Applications

• Portable electronic devices requiring low standby current
• Microprocessor system reset circuits
• Battery-powered equipment monitoring
• General-purpose voltage supervision in embedded systems

Procurement Notes

Verify the specific suffix and package variant against the official datasheet to ensure compatibility with design requirements. Confirm availability status as some variants may be discontinued or subject to last-time buy notices. Cross-reference pinout configurations if substituting into existing layouts to prevent electrical mismatches.

Selection Notes

Select this component when precise voltage monitoring with customizable timing delays is required. Consider the operating voltage range and temperature stability for harsh environments. Evaluate the open-drain output drive capability against load requirements. Ensure the adjustable delay feature aligns with system startup or shutdown sequencing needs.

Part Context

This part belongs to the BU42xx series of CMOS voltage detectors from ROHM. The series is characterized by low voltage operation and adjustable delay times. It serves as a critical component in power management architectures where reliable reset generation and voltage supervision are essential for system integrity.

Replacement Considerations

The BD5225G-1 is listed as a recommended replacement with the same pinout. Verify electrical parameter compatibility and package dimensions before substitution.