BU4222G-TR

Overview

The BU4222G-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-input power supply voltages. It operates within a supply voltage range of 0.7 V to 7 V and features an adjustable reset delay timer. The device provides an open-drain output with a typical under-voltage detection threshold of 2.2 V and a precision of ±1%. It consumes low operating current, specified at 0.40 μA (ON) and 0.55 μA (OFF) at VDET=4.8 V. The component is housed in an SSOP-5 package and supports an extended industrial temperature range from -40°C to +125°C.

Feature Summary

• Adjustable reset delay timer functionality allows customization of response timing via external components.
• Low power consumption design suitable for battery-operated applications with minimal quiescent current draw.
• Open-drain output configuration enables flexible interfacing with various logic families.

Applications

• Portable electronic devices requiring low standby current
• Battery-powered systems needing reliable under-voltage protection
• Industrial control circuits operating in extended temperature environments

Procurement Notes

Verify the obsolete status of this component before procurement, as it is marked Not Recommended for New Designs. Confirm availability through authorized distributors or secondary markets. Ensure that the SSOP-5 package dimensions match your PCB footprint requirements. Check RoHS compliance documentation if required for specific regulatory standards. Validate replacement options such as BD5222G-1 if new production is planned.

Selection Notes

Select this part when a fixed 2.2 V threshold with adjustable delay is required in a compact SSOP-5 package. Consider the low current consumption for energy-sensitive designs. Verify that the open-drain output suits the downstream circuit interface. Evaluate the extended temperature range suitability for harsh environments. Compare against newer alternatives like BD5222G-1 for long-term supply chain stability.

Part Context

This component belongs to the BU42(43)xxG series of voltage detectors from ROHM Semiconductor. It is part of a family offering various threshold voltages and packages. The BU4222G-TR specifically targets applications needing precise under-voltage detection with customizable delay characteristics in a small form factor.

Replacement Considerations

The BD5222G-1 is a recommended replacement with the same pinout and package. It offers similar electrical characteristics but may have updated manufacturing processes. Verify compatibility with existing designs before substitution.