BU4220G-TR

Overview

The BU4220G-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-input power supply lines. It operates within a supply voltage range of 0.9 V to 7 V and features an adjustable reset delay timer. The device provides a threshold detection voltage of 2.0 V with ±1% accuracy and utilizes an open-drain output configuration. It supports a wide operating temperature range from -40°C to +125°C and consumes a typical quiescent current of 550 nA. The component is housed in an SSOP-5 surface-mount package.

Feature Summary

• Adjustable reset delay timer allows customization of response timing via external components
• Open-drain output interface facilitates direct connection to various logic families
• Low power consumption design suitable for battery-operated applications
• High precision voltage detection ensures reliable system supervision

Applications

• Microprocessor and microcontroller power supply supervision
• Portable electronic devices requiring low standby current
• Industrial control systems needing wide temperature operation
• Automotive electronics (non-safety critical)

Procurement Notes

Verify the specific suffix and packaging type when ordering, as availability may vary. Confirm that the component status is acceptable for your project lifecycle, as it is marked Not Recommended for New Designs. Ensure compatibility with existing PCB footprints and verify that the open-drain output requirements match your system design before procurement.

Selection Notes

Select this component when a fixed 2.0 V threshold is required with adjustable delay functionality. Consider the open-drain output capability if interfacing with different voltage logic levels. Evaluate the SSOP-5 package constraints against your board space limitations. Compare performance metrics such as quiescent current and accuracy against alternative supervisory circuits if lower power or higher precision is needed.

Part Context

This part belongs to the BU42(43)xxG series of voltage detectors from ROHM Semiconductor. It is specifically engineered for low-voltage monitoring applications where precise detection and customizable delay times are critical. The series offers various threshold options to suit different power rail requirements while maintaining consistent package and pinout configurations for design flexibility.

Replacement Considerations

The BD5220G-1 is documented as a replacement with the same pinout and package. Verify electrical parameter differences, particularly regarding circuit current and output drive capabilities, before substituting. Ensure that the recommended status of the alternative aligns with long-term supply chain requirements.