BU4210F-TR

Overview

The BU4210F-TR is a CMOS voltage detector IC from ROHM Semiconductor featuring an adjustable delay timer. It operates within a supply voltage range of 0.9 V to 7 V with a typical under-voltage detection threshold of 1.0 V and ±1% precision. The device provides an open-drain output active low, consuming 0.55 µA at 4.8 V. It supports an adjustable reset delay via an external resistor up to 10 MΩ and includes hysteresis equal to 5% of the detection voltage. Operating temperatures span -40°C to +125°C in a compact SOP-4 package.

Feature Summary

• Adjustable output delay time controlled by an external resistor
• High accuracy voltage detection with ±1% precision
• Ultra-low current consumption for battery-powered applications
• Integrated hysteresis to prevent output oscillation

Applications

• Portable electronic devices requiring low power monitoring
• Battery-operated equipment with voltage supervision needs
• General-purpose system reset circuits
• Microprocessor and memory backup power management

Procurement Notes

Verify component authenticity through authorized channels as this part may be subject to end-of-life restrictions. Confirm that the SOP-4 package dimensions match your PCB footprint requirements. Ensure the external delay resistor value aligns with the desired timing specifications. Check for RoHS compliance documentation if required by your manufacturing standards.

Selection Notes

Select this component when precise voltage monitoring with customizable response timing is required. The adjustable delay feature allows designers to filter out transient noise during power-up sequences. Consider the open-drain output capability for interfacing with various logic levels. Evaluate the ultra-low standby current against total system power budgets.

Part Context

This part belongs to the BU42xx series of CMOS voltage detectors designed for low-voltage applications. It complements other variants like the BU4211G and BU4310F which offer different detection thresholds or packages. The series is characterized by high accuracy and minimal power consumption, suitable for modern portable electronics.

Replacement Considerations

The BD5210G-1 is identified as a recommended replacement with the same pinout configuration. Verify compatibility regarding the SSOP-5 package versus the original SOP-4 form factor. Confirm that the electrical characteristics meet the specific design requirements before substitution.